EP1876356B1 - Scroll fluid machine - Google Patents
Scroll fluid machine Download PDFInfo
- Publication number
- EP1876356B1 EP1876356B1 EP06731149.8A EP06731149A EP1876356B1 EP 1876356 B1 EP1876356 B1 EP 1876356B1 EP 06731149 A EP06731149 A EP 06731149A EP 1876356 B1 EP1876356 B1 EP 1876356B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- scroll
- fluid machine
- wall
- chip seal
- seal
- 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 - Fee Related
Links
Images
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 according to the preamble of claim 1.
- a fluid machine is known e.g. from JP-A-57015996 or JP-A-06280760 .
- 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.
- JP-06-280760 A discloses a generic scroll fluid machine having a scroll unit that comprises a fixed scroll and a movable scroll each constructed from an end plate and a scroll wall integral with said end plate, and comprises a chip seal provided at a tip of a scroll wall of one of said scrolls and in relative sliding contact with an end plate of the other scroll, wherein said scroll unit further comprises a radial projection provided on a first wall surface as one of wall surfaces of said scroll walls facing each other and being in relative sliding contact with a second wall surface as the other wall surface to define a fine gap between said wall surfaces when a pressure chamber is formed between said fixed scroll and said movable scroll.
- 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 .
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rotary Pumps (AREA)
Description
- The present invention relates to a scroll fluid machine according to the preamble of
claim 1. Such a fluid machine is known e.g. fromJP-A-57015996 JP-A-06280760 - For example, 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. The movable scroll is operated at an orbital movement relative to the fixed scroll by receiving a drive force via an orbital unit, and by the change of the displacement and the position of the above-described pressure chamber accompanied with this orbital movement, the fluid (fro example, refrigerant) in the pressure chamber is compressed or expanded (for example, Patent document 1).
Patent document 1:JP-A-8-261171 - In the conventional scroll fluid machine as described above, because the scroll walls of the fixed scroll and the movable scroll locally slide relatively to each other to form a pressure chamber, if the sliding contact condition between the scroll walls can be relaxed, the lives of these fixed scroll and movable scroll, ultimately, the life of the fluid machine, may be extended.
- Where, in order to relax the sliding contact condition between the scroll walls, for example, 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. In order to secure a fine gap, however, 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.
- Further, because a great centrifugal force acts on the movable scroll as its orbital speed becomes faster, if a fine gap is secured, the orbital posture of the movable scroll in a high speed range becomes unstable, and depending upon the posture, there may be a fear that a galling occurs between the scroll walls. Therefore, when a fine gap is secured, it is necessary to increase the rigidity of the orbital unit or to employ a design change such as addition of parts to the orbital unit, so as to stabilize the orbital posture of the movable scroll.
- Thus, if a fine gap is tried to be provided between the scroll walls, it becomes necessary to increase the processing accuracy or the assembly accuracy of the scroll unit or the orbital unit, to increase the rigidity of the orbital unit, or to change the design such as addition of parts to the orbital unit, and therefore, reduction in productivity or cost up of the fluid machine may be caused.
-
JP-06-280760 A - Similar scroll fluid machines are disclosed in
JP-57-015996 U US 2004/0062671 A . - It is the object of the present invention to provide a scroll fluid machine where the fine gap can be accurately maintained. This object is solved by the scroll fluid machine having the features of
claim 1. The invention is further developed as it is defined in the dependent claims. - Various forms can be employed as the scroll fluid machine according to the present invention, and for example, it can be formed as a compressor or an expander, and further, as a scroll fluid machine having both functions of compression and expansion. For example, 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.
- In the scroll fluid machine according to the present invention, since 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.
- Further, in the scroll fluid machine according to the present invention, by 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.
- Further, in the scroll fluid machine according to the present invention, if 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.
- Further, in a case where the chip seal has a top seal surface and a sliding contact surface for securing a fine gap, while an excellent durability can be given to each of the top seal surface and the sliding contact surface, 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.
- Further, in a case where a holding means for holding the chip seal at the tip of the scroll wall is further provided, it becomes possible to easily hold the radial projection on the scroll wall side by this holding means. Further, by the structure in which 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. Furthermore, by the structure in which the holding means includes an adhesive layer, the radial projection can be held on the scroll wall side further easily and further securely.
- Further, in a case where 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.
- Furthermore, in a case where 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. In such a structure, since 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] Fig. 1 is a vertical sectional view of a scroll fluid machine applied to a refrigeration circuit according to an embodiment of the present invention. - [
Fig. 2] Fig. 2 is a back surface view of a chip seal applied to the fluid machine depicted inFig. 1 . - [
Fig. 3] Fig. 3 is an elevational view of a movable scroll applied to the fluid machine depicted inFig. 1 . - [
Fig. 4] Fig. 4 is a plan view showing the movable scroll depicted inFig. 3 together with the chip seal depicted inFig. 2 . - [
Fig. 5] Fig. 5 is an enlarged, partial sectional view as viewed along V-V line ofFig. 4 . - [
Fig. 6] Fig. 6 is an explanation diagram showing the sliding contact position between scroll walls of a fixed scroll and a movable scroll and a chip seal in the fluid machine depicted inFig. 1 . - [
Fig. 7] Fig. 7 is an elevational view of a movable scroll according to a comparative example not belonging to the present invention. - [
Fig. 8] Fig. 8 is a sectional view showing a part of a scroll wall together with a chip seal according to a modification of the present invention. - [
Fig. 9] Fig. 9 is a sectional view showing a part of a scroll wall together with a chip seal and a radial projection according to another modification of the present invention. -
- 1: scroll fluid machine
- 35: scroll unit
- 36: fixed scroll
- 38: movable scroll
- 36a, 38a: end plate
- 36b, 38b: scroll wall
- 40: pressure chamber
- 42: chip seal
- 42b: seal surface (top seal surface)
- 42c: outer side surface (sliding contact surface)
- G: fine gap
- Hereinafter, desirable embodiments of the present invention will be explained referring to figures.
Fig. 1 depicts ascroll 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 acirculation passageway 2, and refrigerant as the operational fluid is circulated in thecirculation passageway 2. Where, a lubricant oil is not mixed in the refrigerant, and this refrigeration circuit is oil free. In this embodiment,fluid machine 1 has both functions of a compressor and an expander, and the fluid machine disposed incirculation passageway 2 divides thecirculation passageway 2 into a high-pressure region 2a and a low-pressure region 2b. In high-pressure region 2a, acondenser 4 and areceiver 6 are disposed in order in the circulation direction of refrigerant, and in low-pressure region 2b, anevaporator 8 is interposed. -
Fluid machine 1 has amotor housing 10, and themotor housing 10 has amotor casing 12 with a cup-like shape and anend plate 14 fixed to the opening end of themotor casing 12. Acylindrical stator 16 is fitted into acircumferential wall 12a ofcasing 12, andstator 16 surrounds acolumnar rotor 18 free to rotate. Adrive shaft 20 extends through the center ofrotor 18, and therotor 18 rotates integrally withdrive shaft 20. Shaft holes are provided on the central parts ofend wall 12b ofcasing 12 andend plate 14, respectively, and both end portions ofdrive shaft 20 are projected from these shaft holes. Driveshaft 20 is supported free to rotate byend wall 12b andend plate 14 viaball bearings 22 provided in the shaft holes. Further, in the shaft holes, lip seals 24 are provided at positions outsideball bearings 22, and the shaft holes are closed by the lip seals 24. - A
power supply port 26 is provided tocircumferential wall 12a ofmotor casing 12, and power can be supplied tostator 16 from an external power source (not shown) throughpower supply port 26. When power is supplied tostator 16, rotor is rotated by the electromagnetic force ofstator 16, thereby rotatingdrive 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 tomotor housing 10 by a plurality ofbolts 32, and the opening end ofcompression casing 30 is fitted at a gas-tight condition to each end ofmotor housing 10 via O-ring 34. - A
scroll unit 35 is provided incompression casing 30, andscroll unit 35 has metal fixedscroll 36 andmovable scroll 38. These fixedscroll 36 andmovable scroll 38 haveend plates walls end plates fluid machine 1, the end wall ofcompression casing 30 is formed also asend plate 36a of fixedscroll 36. - These fixed
scroll 36 andmovable scroll 38 are disposed so as to be engaged with each other in order to form pressure chamber 40 (fluid pocket) therebetween. Under this disposition,movable scroll 38 can be operated at an orbital movement relative to fixedscroll 36, and accompanied with this orbital movement,pressure chamber 40 is changed in its displacement as well as in its position. - Resin chip seals 42 are provided on the tips of
scroll walls walls scroll 36 andmovable scroll 38 are in sliding contact withend plates scrolls - Hereinafter,
chip seal 42 will be explained, and because the structures of chip seals 42 provided on fixedscroll 36 andmovable scroll 38, and fixing means of chip seals 42 to scrollwalls chip seal 42 ofmovable scroll 38 side. - As shown in
Fig. 2 ,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 ofchip seal 42, pins 42a are projected at predetermined positions in the lengthwise direction (spiral direction). - As shown in
Fig. 3 , on the tip ofscroll wall 38b to be attached withchip seal 42, the region connected to the outer wall surface among both wall surfaces ofscroll wall 38b is formed as aflat surface 46 at a position close toend plate 38a as compared withtip surface 44 connected to the inner wall surface.Flat surface 46 also extends spirally, and pinholes 46a are formed at predetermined positions in the lengthwise direction. - As shown in
Fig. 4 ,chip seal 42 is overlapped withflat surface 46, and at that time, pins 42a are inserted intopin holes 46a. Therefore, as shown inFig. 4 , by the fitting ofpins 42a intopin holes 46a,chip seal 42 is fixed to the tip ofscroll wall 38b. - Where, as shown in
Fig. 5 , a part ofchip seal 42 is projected at a predetermined length fromtip surface 44 ofscroll wall 38b in the thickness direction ofchip seal 42, and the front surface ofchip seal 42 is parallel to thetip surface 44 ofscroll wall 38b, but is positioned nearend plate 36a of fixedscroll 36 as compared with thetip surface 44. Therefore, the front surface ofchip seal 42 forms aseal surface 42b which is in sliding contact withend plate 36a of fixedscroll 36, over its entire region. - Further, a part of
chip seal 42 is projected at a predetermined length from the outer wall surface ofscroll wall 38b in the width direction of chip seal 42 (the radial direction ofscroll wall 38b), andouter side surface 42c among both side surfaces defining the width ofchip seal 42 is parallel to the outer wall surface ofscroll wall 38b, but is positioned near the inner wall surface ofscroll wall 36b of fixedscroll 36 as compared with this outer wall surface. Therefore, at the position in the lengthwise direction wherescroll walls outer side surface 42c ofchip seal 42 is in sliding contact with the inner wall surface ofscroll wall 36b of fixedscroll 36. At this position in the lengthwise direction, a fine gap G is formed between the inner and outer wall surfaces ofscroll walls chip seal 42. - In more detail,
Fig. 6 is a modification diagram for explaining the sliding contact positions betweenscroll walls outer side surface 42c ofchip seal 42, andouter side surface 42c ofchip seal 42 atmovable scroll 38 side is in sliding contact with the inner wall surface ofscroll wall 36b of fixedscroll 36 at two positions (points A, B). On the other hand,outer side surface 42c ofchip seal 42 atfixed scroll 36 side is in sliding contact with the inner wall surface ofscroll wall 38b ofmovable scroll 38 at two positions (points C,D). - Fine gap G is formed between the inner and outer wall surfaces of
scroll walls pressure chamber 40 in the lengthwise direction ofscroll walls outer side surface 42c of eachchip seal 42 is in sliding contact with the inner wall surface at a position near the root of each ofscroll walls Figs. 4 and6 , in order to indicatechip seal 42 clearly, the hatching is provided only to chipseal 42. - Referring to
Fig. 1 again,movable scroll 38 is connected to each end ofdrive shaft 20 via an orbital unit to enable the orbital movement ofmovable scroll 38. In more detail, aneccentric bush 50 is fixed to each end ofdrive shaft 20, and theeccentric bush 50 can be rotated integrally withdrive shaft 20.Eccentric bush 50 is surrounded by a boss provided integrally to the outer surface ofend plate 38a, and between theeccentric bush 50 and the boss,ball bearing 52 is interposed. - Further, a rotation preventing mechanism for preventing the rotation of
movable scroll 38 aroundeccentric bush 50 is provided betweenend plate 38a of eachmovable scroll 38 andend wall 12b orend plate 14. The rotation preventing mechanism includes, for example, acrank pin 54, and thecrank pin 54 connects betweenend wall 12b orend plate 14 andend plate 38a via twoball bearings 56. - Where,
counter weights 58 are attached to driveshaft 20 at positions of both sides ofrotor 18, and thecounter weights 58 become balance weights for the orbital movements ofmovable scrolls 38. High-pressure ports 60 and low-pressure ports (not shown) are provided oncompression casing 30 for supplying and discharging high-pressure and low-pressure refrigerants to and from both scrollunits 35. In more detail, each high-pressure port 60 provided through the end wall ofcompression casing 30, namely, the central part ofend plate 36a of fixedscroll 36, andpressure chamber 40 positioned at the central part ofend plate 36a is connected to high-pressure region 2a ofcirculation passageway 2 via the high-pressure port 60. The low-pressure port is provided through the circumferential wall ofcompression casing 30, and the inside ofcompression casing 30 is connected to low-pressure region 2b ofcirculation passageway 2 via the low-pressure port. - Hereinafter, the operation of
scroll fluid machine 1 in the above-described refrigeration circuit will be explained.
Whenrotor 18, that is,drive shaft 20, is rotated by the power supply tostator 16, accompanied with the rotation ofdrive shaft 20,movable scroll 38 is served to an orbital movement viaeccentric bush 50. By this orbital movement,scroll unit 35 on the left side inFig. 1 carries out the following compression process. - First, the left-
side scroll unit 35 sucks low-pressure gas refrigerant from low-pressure region 2b ofcirculation passageway 2 intopressure chamber 40 positioned at the outer circumferential region through the low-pressure port and the space betweenscroll unit 35 andcompression casing 30. Thereafter, thepressure chamber 40 having sucked the refrigerant moves toward the central portions ofend plates scroll walls pressure chamber 40 is compressed by reduction of the volume of thepressure chamber 40. Then, the refrigerant compressed in thepressure chamber 40 flows out to high-pressure region 2a ofcirculation passageway 2 through high-pressure port 60 when thepressure chamber 40 is communicated with the high-pressure port 60 at the central portions ofend plates - The high-pressure gas refrigerant flowed into high-
pressure region 2a is cooled and condensed atcondenser 4, and after becoming a high-pressure liquid refrigerant, bubbles and moisture are removed atreceiver 6. The high-pressure liquid refrigerant having passed throughreceiver 6 is supplied to the right-side scroll unit inFig. 1 , and this right-side scroll unit 35 carries out the following expansion process. - In the right-
side scroll unit 35, the high-pressure liquid refrigerant sent from high-pressure region 2a ofcirculation passageway 2 flows intopressure chamber 40 positioned at the central portions ofend plates pressure port 60. Thereafter, thepressure chamber 40, into which the refrigerant has flowed, moves toward the outer circumferential portions ofend plates scroll walls pressure chamber 40 is expanded by increase of the volume of thepressure chamber 40. - The refrigerant expanded in
pressure chamber 40 flows into low-pressure region 2b ofcirculation passageway 2 through the space betweenscroll unit 35 andcompression casing 30 and the low-pressure port at the outer circumferential region ofscroll unit 35 when thepressure 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 intopressure chamber 40 of leftside scroll unit 35. - In the above-described scroll
fluid machine 1, a part of chip seal 42 (that is, a radial projection) is radially projected from the outer wall surface ofscroll wall scroll walls scroll walls scroll walls scroll fluid machine 1. - Further, in this
scroll fluid machine 1, because a part of chip seal 42 (radial projection) secures the fine gap G between the inner and outer wall surfaces ofscroll walls movable scroll 38 is in an orbital movement at a high speed, the orbital posture of themovable scroll 38 is not be disturbed. As a result, occurrence of galling betweenscroll walls - Thus, since the abrasion of
scroll walls scroll walls scroll fluid machine 1 has an excellent durability. Besides, in thisscroll fluid machine 1, because the fine gap G is secured betweenscroll walls scroll walls 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, thisfluid machine 1 can be applied to various uses. - Further, in this refrigeration circuit, since
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 inpressure chamber 40 of right-side scroll unit 35 gives an auxiliary power to driveshaft 20 via the orbital movement ofmovable scroll 38, and by utilizing this auxiliary power, the refrigerant can be compressed inpressure chamber 40 of left-side scroll unit 35. - Where, in this
scroll fluid machine 1, it is possible to maintain the sealability ofpressure chamber 40 by making the fine gap G several-tens µm or less. - The present invention is not limited to the above-described embodiment, and various modifications can be employed.
For example, although, in the above-described embodiment, pins 42a are formed onchip seal 42 andpin holes 46a are formed onflat surface 46 as a holding means for holdingchip seal 42 onscroll walls chip seal 42 and the pins may be formed onflat surface 46. However, from the viewpoint of the productivity of the fluid machine, it is preferred that pins 42a are formed onchip seal 42 andpin holes 46a are formed onflat surface 46. - Further, as a comparative example not belonging to the invention, a projected strip may be formed instead of
pins 42a, and as shown inFig. 7 , agroove 46b for fitting the projected strip thereinto may be formed instead ofpin holes 46a. Namely, the holding means may be provided betweenscroll walls 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 byscroll walls - Moreover, the holding means may include an
adhesive layer 70 as shown inFig. 8 . Further, although a part ofchip seal 42 is projected from the outer wall surface ofscroll wall chip seal 42 may be projected from the inner wall surface ofscroll wall - Further, as shown in
Fig. 8 , achip seal 72 having a portion projected from the outer and inner wall surfaces ofscroll wall pressure chamber 40 is formed,outer wall surface 72c andinner wall surface 72d ofchip seal 72 is in sliding contact with the inner wall surface and outer wall surface ofcounter-side scroll wall chip seal 72 may be provided on both of fixed andmovable scrolls chip seal 72 may be provided on one of fixedscroll 36 andmovable scroll 38, and a conventional chip seal may be provided on the other scroll. - Further, as shown in
Fig. 9 , aradial projection 76 may be provided as a member separate from aconventional chip seal 74. In this case, byradial projection 76, a fine gap G can be secured between the inner and outer wall surfaces ofscroll walls chip seal 74 andradial projection 76 are formed separately from each other, because the number of parts increases and it is necessary to provide means for holdingchip seal 74 andradial projection 76 onscroll walls chip seal 42 is projected from the outer wall surface as in the aforementioned embodiment. In other words, it is preferred thatradial projection 76 is formed integrally withchip seal 74. - Further, if a part of
chip seal 42 is projected from the outer wall surface ofscroll wall scroll walls drive shaft 20 supportingmovable scroll 38, even if themovable scroll 38 is operated at a high-speed orbital movement, the disturbance of the orbital posture of themovable scroll 38 can be prevented securely. - Furthermore, if a part of
chip seal 42 is projected from the outer wall surface ofscroll wall seal surface 42b can be formed also on the projected portion, during the operation of the fluid machine, the surface pressure betweenchip seal 42 andend plates chip seal 42 can be increased. Therefore, aschip seal 42, it is preferred thatseal surface 42b extends up to the projected portion in the width direction and anouter side surface 42c is connected perpendicularly to the side edge of theseal surface 42b. - In
fluid machine 1 according to the aforementioned embodiment, it is preferred thatchip 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. - Although
fluid machine 1 according to the aforementioned embodiment has twoscroll units 35 provided on both end portions ofdrive 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.
Claims (7)
- A scroll fluid machine (1) having a scroll unit (35) that comprises a fixed scroll (36) and a movable scroll (38) each constructed from an end plate (36a, 38a) and a scroll wall (36b, 38b) integral with said end plate (36a, 38a), and comprises a chip seal (42; 72; 74) provided at a tip of a scroll wall (38b) of one of said scrolls (38) and in relative sliding contact with an end plate (36a) of the other scroll (36), wherein said scroll unit (35) further comprises a radial projection provided on a first wall surface as one of wall surfaces of said scroll walls(36b, 38b) facing each other and being in relative sliding contact with a second wall surface as the other wall surface to define a fine gap (G) between said wall surfaces when a pressure chamber (40) is formed between said fixed scroll (36) and said movable scroll (38),
characterized in that
pins (42a) are provided to a chip seal (42) side, pin holes (46a) are provided to a flat surface (46) side, and said pins (42a) are inserted into corresponding pin holes (46a), respectively. - The scroll fluid machine (1) according to claim 1, wherein said radial projection is formed integrally with said chip seal (42; 72; 74).
- The scroll fluid machine (1) according to claim 2, wherein said chip seal (42; 72; 74) includes a top seal surface (42b; 72b) which is in relative sliding contact with said end plate (36a) of said the other scroll (36), and a sliding contact surface (42c; 72c) which is connected perpendicularly to a side edge of said top seal surface (42b; 72b) and which is positioned relatively to said first wall surface with a distance corresponding to said fine gap (G).
- The scroll fluid machine (1) according to claim 2, wherein pins (42a) and said pin holes (46a) form a holding means for holding said chip seal (42; 72; 74) at said tip of said scroll wall (36b, 38b).
- The scroll fluid machine (1) according to claim 4, wherein said holding means further comprises an adhesive layer.
- The scroll fluid machine (1) according to claim 1, wherein said chip seal (42; 72; 74) 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 (1) according to claim 1, wherein a motor is further provided, and said scroll unit (35) is provided on each end of a rotational shaft of said motor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005116985A JP2006291925A (en) | 2005-04-14 | 2005-04-14 | Scroll type fluid machine |
PCT/JP2006/307201 WO2006112262A1 (en) | 2005-04-14 | 2006-04-05 | Scroll fluid machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1876356A1 EP1876356A1 (en) | 2008-01-09 |
EP1876356A4 EP1876356A4 (en) | 2008-04-02 |
EP1876356B1 true EP1876356B1 (en) | 2013-06-26 |
Family
ID=37114989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06731149.8A Expired - Fee Related EP1876356B1 (en) | 2005-04-14 | 2006-04-05 | Scroll fluid machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090060768A1 (en) |
EP (1) | EP1876356B1 (en) |
JP (1) | JP2006291925A (en) |
CN (1) | CN101160466A (en) |
WO (1) | WO2006112262A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011038480A (en) * | 2009-08-12 | 2011-02-24 | Sanden Corp | Scroll fluid machine |
GB2472637B (en) | 2009-08-14 | 2015-11-25 | Edwards Ltd | Scroll Compressor With Plural Sealing Types |
GB0914230D0 (en) * | 2009-08-14 | 2009-09-30 | Edwards Ltd | Scroll pump |
DE102010025988A1 (en) * | 2010-07-02 | 2012-01-26 | Handtmann Systemtechnik Gmbh & Co. Kg | Charging device for the compression of charge air |
GB2489469B (en) | 2011-03-29 | 2017-10-18 | Edwards Ltd | Scroll compressor |
JP6021373B2 (en) * | 2012-03-23 | 2016-11-09 | 三菱重工業株式会社 | Scroll compressor and method of processing the scroll |
IN2015MN00117A (en) | 2012-07-23 | 2015-10-16 | Emerson Climate Technologies | |
US20140024563A1 (en) | 2012-07-23 | 2014-01-23 | Emerson Climate Technologies, Inc. | Anti-wear coatings for compressor wear surfaces |
JP6125216B2 (en) * | 2012-12-14 | 2017-05-10 | サンデンホールディングス株式会社 | Scroll type fluid machinery |
JP6587827B2 (en) * | 2015-05-15 | 2019-10-09 | サンデンホールディングス株式会社 | Fluid machinery |
WO2019043741A1 (en) * | 2017-08-28 | 2019-03-07 | 三菱電機株式会社 | Compressor |
DE102020203260A1 (en) | 2019-03-28 | 2020-10-01 | Kabushiki Kaisha Toyota Jidoshokki | ELECTRIC COMPRESSOR |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3994635A (en) * | 1975-04-21 | 1976-11-30 | Arthur D. Little, Inc. | Scroll member and scroll-type apparatus incorporating the same |
US4199308A (en) * | 1978-10-02 | 1980-04-22 | Arthur D. Little, Inc. | Axial compliance/sealing means for improved radial sealing for scroll apparatus and scroll apparatus incorporating the same |
JPS5715996U (en) | 1980-07-01 | 1982-01-27 | ||
JPS5715996A (en) * | 1980-07-03 | 1982-01-27 | Mizusawa Ind Chem Ltd | Novel clay mineral based color former for heat-sensitive copying paper and production thereof |
US4415317A (en) * | 1981-02-09 | 1983-11-15 | The Trane Company | Wrap element and tip seal for use in fluid apparatus of the scroll type |
US4395205A (en) * | 1981-02-12 | 1983-07-26 | Arthur D. Little, Inc. | Mechanically actuated tip seals for scroll apparatus and scroll apparatus embodying the same |
JPS63158594U (en) * | 1987-04-04 | 1988-10-18 | ||
US5258046A (en) * | 1991-02-13 | 1993-11-02 | Iwata Air Compressor Mfg. Co., Ltd. | Scroll-type fluid machinery with seals for the discharge port and wraps |
JP3162502B2 (en) * | 1992-09-10 | 2001-05-08 | エヌティエヌ株式会社 | Seal member for compressor |
JP3155390B2 (en) * | 1993-03-30 | 2001-04-09 | トキコ株式会社 | Scroll type fluid machine |
JPH1068391A (en) * | 1996-08-27 | 1998-03-10 | Asuka Japan:Kk | Tip seal for scroll fluid machinery |
US6068459A (en) * | 1998-02-19 | 2000-05-30 | Varian, Inc. | Tip seal for scroll-type vacuum pump |
JPH11280676A (en) * | 1998-03-27 | 1999-10-15 | Tokico Ltd | Scroll type fluid machinery |
JP3544309B2 (en) * | 1998-11-09 | 2004-07-21 | 株式会社豊田自動織機 | Fuel cell device |
US6074185A (en) * | 1998-11-27 | 2000-06-13 | General Motors Corporation | Scroll compressor with improved tip seal |
US6808373B2 (en) | 2002-09-27 | 2004-10-26 | Tokico Ltd. | Scroll fluid machine having projections on a wrap peripheral surface |
JP4142418B2 (en) * | 2002-11-29 | 2008-09-03 | 株式会社日立製作所 | Scroll type fluid machine |
JP2004245059A (en) * | 2003-02-10 | 2004-09-02 | Toyota Industries Corp | Scroll type compressor, and method of manufacturing scroll used for the compressor |
JP2004285880A (en) * | 2003-03-20 | 2004-10-14 | Anest Iwata Corp | Scroll fluid machine |
JP4276024B2 (en) * | 2003-08-11 | 2009-06-10 | 株式会社日立製作所 | Scroll type fluid machine |
-
2005
- 2005-04-14 JP JP2005116985A patent/JP2006291925A/en active Pending
-
2006
- 2006-04-05 EP EP06731149.8A patent/EP1876356B1/en not_active Expired - Fee Related
- 2006-04-05 WO PCT/JP2006/307201 patent/WO2006112262A1/en active Application Filing
- 2006-04-05 US US11/911,656 patent/US20090060768A1/en not_active Abandoned
- 2006-04-05 CN CNA2006800123876A patent/CN101160466A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2006291925A (en) | 2006-10-26 |
EP1876356A1 (en) | 2008-01-09 |
WO2006112262A1 (en) | 2006-10-26 |
CN101160466A (en) | 2008-04-09 |
EP1876356A4 (en) | 2008-04-02 |
US20090060768A1 (en) | 2009-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1876356B1 (en) | Scroll fluid machine | |
US6672101B2 (en) | Electrically driven compressors and methods for circulating lubrication oil through the same | |
KR20010078226A (en) | Scroll compressor | |
US8075289B2 (en) | Scroll-type fluid machine including thrust receiving device | |
JPH01138389A (en) | Scroll type compressor | |
CN110360101B (en) | Compressor with bushing | |
CN110469504B (en) | Compressor with bushing | |
US7641455B2 (en) | Scroll compressor with reduced oldham ring noise | |
US20020136653A1 (en) | Scroll compressors and methods for circulating lubrication oil through the same | |
US20040253133A1 (en) | Scroll compressor | |
CN109113990B (en) | Scroll compressor having a plurality of scroll members | |
CN111379704A (en) | Electric compressor | |
CN211924458U (en) | Compressor with cross key | |
JP4440565B2 (en) | Scroll compressor | |
US20020136652A1 (en) | Electrically driven compressors and methods for circulating lubrication oil through the same | |
US5026264A (en) | Fluid compressor | |
JPH08151988A (en) | Rotary compressor | |
EP2483563A2 (en) | Rotary compressor | |
EP2669523B1 (en) | Scroll compressor | |
CN111089057A (en) | Oil supply mechanism for rotary machine and rotary machine | |
CN107407280B (en) | Rotary compressor device | |
US20060233654A1 (en) | Compressor with radial compliance mechanism | |
JP4790757B2 (en) | Scroll compressor | |
JP2001342979A (en) | Scroll compressor and method for manufacturing scroll member of the compressor | |
CN115003913B (en) | Scroll compressor for compressing refrigerant and method for oil enrichment and distribution |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20071031 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20080229 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR |
|
17Q | First examination report despatched |
Effective date: 20080625 |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: TAKEI, YUJI C/O SANDEN CORPORATION |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAC | Information related to communication of intention to grant a patent modified |
Free format text: ORIGINAL CODE: EPIDOSCIGR1 |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602006036988 Country of ref document: DE Effective date: 20130822 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20140327 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602006036988 Country of ref document: DE Effective date: 20140327 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602006036988 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602006036988 Country of ref document: DE Effective date: 20141101 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20141231 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140430 |