US20130302200A1 - Scroll type fluid machine, method and device for forming elastic coating thereon - Google Patents

Scroll type fluid machine, method and device for forming elastic coating thereon Download PDF

Info

Publication number
US20130302200A1
US20130302200A1 US13/940,660 US201313940660A US2013302200A1 US 20130302200 A1 US20130302200 A1 US 20130302200A1 US 201313940660 A US201313940660 A US 201313940660A US 2013302200 A1 US2013302200 A1 US 2013302200A1
Authority
US
United States
Prior art keywords
coating
scroll
wrap portion
spray nozzle
elastic
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.)
Abandoned
Application number
US13/940,660
Other languages
English (en)
Inventor
Junichi Asami
Toru Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anest Iwata Corp
Original Assignee
Anest Iwata Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anest Iwata Corp filed Critical Anest Iwata Corp
Assigned to ANEST IWATA CORPORATION reassignment ANEST IWATA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASAMI, JUNICHI, SATO, TORU
Publication of US20130302200A1 publication Critical patent/US20130302200A1/en
Priority to US15/388,964 priority Critical patent/US20170167486A1/en
Abandoned legal-status Critical Current

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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F01C1/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F01C1/0269—Details concerning the involute wraps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/02—Elasticity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/14—Self lubricating materials; Solid lubricants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/20—Resin

Definitions

  • the present invention relates to a scroll type fluid machine, and a method and a device for forming an elastic coating thereon, with which an elastic coating can be formed on a side face of a spiral wrap forming the scroll type fluid machine while preventing seizure, galling, wear, and contact damage on the wrap portion side face.
  • a scroll type fluid machine is used as a scroll type compressor, a scroll type vacuum pump, a scroll type expander, a scroll type air blower, and the like.
  • a scroll type fluid machine is constituted by a fixed scroll and an orbiting scroll having spiral wrap portions that stand upright on end plates thereof, and a driving mechanism that causes the orbiting scroll to orbit without rotating.
  • a plurality of enclosed spaces surrounded by the end plates and the wrap portions of the fixed scroll and the orbiting scroll are formed, and a processing subject gas is introduced into the enclosed spaces and subjected to processing such as compression, expansion, or decompression.
  • the enclosed spaces formed by the fixed scroll and the orbiting scroll must be sealed tightly in order to compress or decompress the gas suctioned therein.
  • a minute gap of a size at the micron scale must be formed between the wrap portions of the fixed scroll and the orbiting scroll. In consideration of these points, a high degree of processing precision is required to form the fixed scroll and the orbiting scroll.
  • FIG. 3 of Patent Document 2 is shown in FIG. 7 .
  • a fixed scroll 100 is constituted by an end plate 102 and a wrap portion 104
  • an orbiting scroll 110 is constituted by an end plate 112 and a wrap portion 114 .
  • a temperature and a pressure are low in an outer peripheral portion and increase steadily toward a central portion. Therefore, stress acts on the wrap portion 114 of the orbiting scroll 110 from the central portion toward the outer peripheral portion, causing the wrap portion 114 to deform in the manner of an opening petal. This tendency is also observed in the fixed scroll 100 , albeit to a lesser degree.
  • gaps 120 a and 120 b between the wrap portions 104 , 114 and the end plates 102 , 112 increase from the central portion toward the outer peripheral portion.
  • One method of securing the minute gap between the wrap portions is to apply a coating to a side face or an end face of the wrap.
  • An optimum gap is formed between the wrap portions by interposing a coating film having a lubricating property and a wear-resistant property between the wrap portions, providing the coating film with an impact absorbing function, and scraping away surplus of the coating film during an operation.
  • Patent Document 1 discloses a configuration in which an elastic coating layer constituted by an elastic material such as rubber or a synthetic resin material is formed on at least one wrap side face of a scroll, and a lubricating coating layer constituted by a self-lubricating material such as a resin material containing molybdenum disulfide (MoS 2 ), a fluorine-based resin material, or a carbon-based resin material is formed on the elastic coating layer.
  • MoS 2 molybdenum disulfide
  • Patent Document 2 relates to a scroll type pump, and discloses a configuration and a method for applying a surface coating formed from a coolant-resistant resin containing MoS 2 particles to a wrap portion and an end plate of a scroll.
  • the scroll type pump is assembled and operated after applying the surface coating but before the surface coating hardens, whereby surplus surface coating is discharged to the exterior of the scroll such that the surface coating obtains an appropriate coating thickness.
  • Patent Document 3 discloses a configuration for forming a lubricating coating layer constituted by a similar self-lubricating material to that of Patent Document 1 on a side face of a wrap portion of a scroll. Patent Document 3 also discloses a method of determining a coating thickness of the lubricating coating layer from a measurement value of a radial clearance formed between side faces of respective wrap portions of a fixed scroll and an orbiting scroll.
  • Patent Document 4 discloses a scroll compressor in which cast iron having high tensile strength is used as a scroll base material and an impact caused by contact between wrap portions is mitigated by covering the scroll base material with a resin having greater elasticity than the metal of the scroll base material.
  • Patent Document 1 Japanese Patent Application Publication No. H11-280669
  • Patent Document 2 Japanese Patent Application Publication No. 2003-35284
  • Patent Document 3 Japanese Patent Application Publication No. 2009-57897
  • Patent Document 4 Japanese Patent Application Publication No. 2007-245234
  • Patent Documents 1 to 4 do not disclose a method of precisely controlling the coating thickness of the coating layer.
  • the coating is handled in an unhardened state, making it difficult to obtain a precise coating thickness.
  • the coating thickness of the coating layer is determined on the basis of the measurement value of the clearance between the wrap side faces, but the clearance between the wrap side faces takes different values in a center and on an outer side of the wrap portion, and also differs due to thermal deformation of the wrap portion. The clearance between the wrap side faces must therefore be measured in each region, and an optimum coating thickness is not always obtained during an operation.
  • Patent Documents 1 to 4 discloses a method of making this possible.
  • a first object of the present invention is to enable formation of a coating layer with which a tightly sealed enclosed space is formed between a fixed scroll and an orbiting scroll without the need for precise control of a coating thickness and seizure, galling, wear, contact damage, and the like do not occur between wrap side faces.
  • a second object of the present invention is to realize a coating formation device with which an even and highly precise coating thickness can be obtained easily over an entire lengthwise direction of a wrap portion.
  • the elastic coating is obtained by dispersing a powdered solid lubricant in a synthetic resin that possesses elasticity and is more flexible than a scroll base material constituting the wrap portion, and is formed at a coating thickness that enables elastic deformation relative to an opposing wrap portion side face of another scroll during an operation while ensuring that a clearance is not generated between the wrap portion side faces.
  • the “coating thickness that enables elastic deformation” is a coating thickness at which the elastic coating can adhere tightly to the wrap portion side face in a state of constant elastic deformation during an operation of the scroll type fluid machine without undergoing plastic deformation and without creating a clearance between the wrap portion side faces during the operation.
  • the coating thickness exceeds the coating thickness that enables elastic deformation, plastic deformation occurs, creating a clearance between the opposing wrap portion side faces, and as a result, an enclosed space cannot be formed.
  • the elastic coating may be damaged by plastic deformation such that the wrap portion side faces contact each other directly, and as a result, the wrap portions may be damaged.
  • the elastic coating according to the present invention is obtained by dispersing the powdered solid lubricant in the synthetic resin that possesses elasticity and is more flexible than the scroll base material constituting the wrap portion, and therefore favorable lubricating and sliding properties can be obtained in relation to opposing wraps of a fixed scroll and an orbiting scroll. As a result, seizure, galling, wear, contact damage, and the like between opposing wrap portion side faces can be suppressed.
  • the elastic coating according to the present invention is formed at the coating thickness that enables elastic deformation relative to the opposing wrap portion side face of the other scroll during an operation while ensuring that a clearance is not generated between the wrap portion side faces.
  • the elastic coating remains tightly adhered to the wrap portion side face at all times, and therefore favorable adhesiveness is realized in relation to the wrap portion side face.
  • the enclosed space formed between the fixed scroll and the orbiting scroll can be sealed more tightly.
  • the elastic coating is preferably formed by applying a coating solution obtained by dissolving constituent components of the elastic coating in a solvent, to the wrap portion side face at a coating thickness that exceeds the coating thickness enabling elastic deformation during an operation, drying the coating solution, and then finishing the coating solution to the coating thickness enabling elastic deformation by performing a break-in operation.
  • the coating solution is applied at a coating thickness that exceeds the coating thickness enabling elastic deformation, whereupon the coating solution is then finished to the coating thickness enabling elastic deformation by performing a break-in operation to scrape away or wear down a surplus part. In so doing, fine adjustment of the coating thickness of the coating solution is not required during the application process, and therefore an application operation is easy.
  • spray coating, electrostatic coating, and the like may be used as a method of applying the coating solution.
  • the elastic coating is preferably formed by applying a coating solution containing 10 to 20% by weight of a synthetic resin having epoxy resin as a main component and 25 to 40% by weight of a powdered solid lubricant having MoS 2 as a main component, with a remainder thereof constituted by the solvent, to the wrap portion side face, and then hardening the coating solution by baking.
  • Epoxy resin is much more flexible than the metal base material constituting the scroll, and also possesses elasticity.
  • epoxy resin is a thermosetting resin, and is therefore hardened by baking following application. Fluorine resin is not adhesive and peels away easily following an impact. Greater adhesive strength relative to the wrap portion side face can therefore be obtained with epoxy resin than with fluorine resin.
  • PTFE polytetrafluoroethylene
  • the lubricating and sliding properties relative to the opposing wrap portion side face of the other scroll can be improved.
  • the MoS 2 shifts within the coating upon reception of an impact, thereby absorbing and mitigating the impact.
  • seizure, galling, wear, contact damage, and the like on the wrap portion side face can be suppressed.
  • the epoxy resin is highly elastic, and therefore enhances the lubricating and sliding effects of the solid lubricant. Note that graphite or the like may be added in addition to the MoS 2 .
  • the coating thickness of the elastic coating following a break-in operation is preferably between 30 and 80 ⁇ m.
  • the coating thickness of the elastic coating is smaller than 30 ⁇ m, direct contact occurs between the wrap portion side faces, causing the wrap portions to be damaged.
  • the coating thickness of the elastic coating is equal to or greater than 30 ⁇ m, on the other hand, contact between the wrap portion side faces can be prevented reliably, and as a result, damage to the wrap portions can be prevented.
  • 80 ⁇ m is a maximum coating thickness that can be achieved in a single application, and therefore, when the coating thickness reaches or exceeds 80 ⁇ m, variation therein starts to occur. Further, when the coating thickness reaches or exceeds 90 ⁇ m, the elastic coating begins to peel away. Hence, by keeping the coating thickness of the elastic coating at or below 80 ⁇ m, the adhesive strength can be improved while preventing peeling.
  • the scroll type fluid machine according to the present invention can be applied equally effectively when a processing subject gas is air and lubricating oil is not used.
  • the elastic coating according to the present invention has MoS 2 , which is self-lubricating, as a main component, and therefore the lubricating and sliding properties can be secured sufficiently between the opposing wrap portion side faces even in a scroll type fluid machine to which no lubricating oil is supplied.
  • a method for forming the above elastic coating according to the present invention includes: a preliminary step of fixing a scroll constituted by a spiral wrap portion and an end plate to a rotating table and rotating the scroll about a spiral center of the wrap portion; a coating solution spraying step of moving a spray nozzle in a radial direction of the scroll while spraying a coating solution obtained by dissolving constituent components of the elastic coating in a solvent, onto the rotating scroll toward a side face of the wrap portion using the spray nozzle; and a coating thickness adjusting step of keeping a coating thickness of the coating solution constant by adjusting a rotation speed of the scroll in accordance with a radial direction movement of the spray nozzle.
  • the coating solution is sprayed toward the wrap portion side face from the spray nozzle while rotating the scroll on the rotating table.
  • a movement speed of the spray nozzle is preferably kept constant, and the rotation speed of the scroll is preferably adjusted in accordance with the movement speed.
  • the movement speed of the spray nozzle can be kept constant, thereby eliminating the need to adjust the movement speed of the spray nozzle.
  • only the rotation speed of the scroll need to be controlled during an operation, and therefore control can be performed easily. Accordingly, a control device can be simplified.
  • the spray nozzle is preferably moved in an outside direction from the spiral center of the wrap, and the rotation speed of the scroll is preferably reduced gradually in accordance with a movement speed of the spray nozzle. In so doing, the coating thickness of the coating can be made even in the central region and the outside region of the scroll.
  • the spray nozzle is preferably moved from an outer diameter side toward a center of the scroll, and the rotation speed of the scroll is preferably increased gradually in accordance with a movement speed of the spray nozzle. Likewise, in so doing, the coating thickness of the coating solution can be made even in the central region and the outside region of the scroll.
  • the spray nozzle in addition to the respective operations described above, can be moved rectilinearly without varying an attitude thereof. In so doing, an operation of the spray nozzle can be controlled easily, and therefore a so-called uniaxial system can be used as a driving system for the spray nozzle. As a result, a driving device and a control device for the spray nozzle can be simplified.
  • a device for forming an elastic coating on a scroll type fluid machine which can be used directly to implement the method according to the present invention described above, includes: a rotation device that includes a rotating table on which a scroll constituted by a wrap portion and an end plate is placed fixedly and a driving device for driving the rotating table, and that rotates the scroll placed fixedly on the rotating table about a spiral center of the wrap portion; a coating solution spraying device having a spray nozzle for spraying a coating solution obtained by dissolving constituent components of the elastic coating in a solvent, onto the rotating scroll toward a side face of the wrap portion, and a driving device for moving the spray nozzle in a radial direction of the scroll; and a controller that keeps a coating thickness of the coating solution constant by controlling a rotation speed of the rotating table and a movement speed of the spray nozzle.
  • the coating solution is sprayed toward the wrap portion side face from the spray nozzle while rotating the scroll on the rotating table.
  • the controller adjust the rotation speed of the scroll and the radial direction movement speed of the spray nozzle relative to the scroll in this condition, the elastic coating can be formed at an even coating thickness.
  • an even coating can be formed on the wrap portion side face with a simple configuration.
  • the coating solution spraying device preferably includes a uniaxial system driving device that moves the spray nozzle along a rectilinear path without varying an attitude of the spray nozzle.
  • a uniaxial system driving device that moves the spray nozzle along a rectilinear path without varying an attitude of the spray nozzle.
  • the spray nozzle preferably includes a slit-shaped discharge port, and a long side of the discharge port preferably has a dimension that corresponds to a height of the wrap portion side face.
  • a long side direction of the spray nozzle can be aligned with a height direction of the wrap portion side face, and therefore the coating solution can be applied in a single application to the entire wrap portion side face in a wrap width direction extending from a contact site contacting the end plate to a tip end site.
  • a time required for a coating solution spraying process can be shortened.
  • the elastic coating is obtained by dispersing a powdered solid lubricant in a synthetic resin that possesses elasticity and is more flexible than a scroll base material constituting the wrap portion, and is formed at a coating thickness at which a state of elastic deformation can be maintained relative to an opposing wrap portion side face of another scroll during an operation while ensuring that a clearance is not generated between the wrap portion side faces.
  • a method for forming an elastic coating on a scroll type fluid machine in which the elastic coating is formed on a side face of a spiral wrap portion includes : a preliminary step of fixing a scroll constituted by the wrap portion and an end plate to a rotating table and rotating the scroll about a spiral center of the wrap portion; a coating solution spraying step of moving a spray nozzle in a radial direction of the scroll while spraying a coating solution obtained by dissolving constituent components of the elastic coating in a solvent, onto the rotating scroll toward the wrap portion side face using the spray nozzle; and a coating thickness adjusting step of keeping a coating thickness of the coating solution constant by adjusting a rotation speed of the scroll in accordance with a radial direction movement of the spray nozzle.
  • the coating can be formed at an even coating thickness.
  • an elastic coating having an even coating thickness can be formed on a wrap portion side face of a scroll easily.
  • the enclosed space of the scroll type fluid machine can be sealed more tightly, and galling, wear, damage, and the like between the wrap portions can be suppressed. As a result, an operating efficiency of the scroll type fluid machine can be improved.
  • a device for forming an elastic coating on a scroll type fluid machine in which an elastic coating is formed on a side face of a spiral wrap portion includes: a rotation device that includes a rotating table on which a scroll constituted by the wrap portion and an end plate is placed fixedly and a driving device for driving the rotating table, and that rotates the scroll placed fixedly on the rotating table about a spiral center of the wrap portion; a coating solution spraying device having a spray nozzle for spraying a coating solution obtained by dissolving constituent components of the elastic coating in a solvent, onto the rotating scroll toward the wrap portion side face, and a driving device for moving the spray nozzle in a radial direction of the scroll; and a controller that keeps a coating thickness of the coating solution constant by controlling a rotation speed of the rotating table and a movement speed of the spray nozzle.
  • FIG. 1 is a partially enlarged sectional view showing a scroll type fluid machine according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing a method and a device for forming an elastic coating according to the first embodiment of the present invention
  • FIG. 3 is a partial front view showing an elastic coating formation device according to the first embodiment
  • FIG. 4 is a table showing results of a test performed on the elastic coating according to the first embodiment
  • FIG. 5 is a partial front view showing a method and a device for forming an elastic coating according to a second embodiment of the present invention
  • FIG. 6 is a perspective view showing a spray nozzle according to the second embodiment.
  • FIG. 7 is a partial sectional view showing thermal deformation in a scroll type compressor.
  • FIG. 1 shows a meshing portion between a fixed scroll 10 and an orbiting scroll 20 of a non-lubricated scroll type air compressor.
  • the aluminum fixed scroll 10 is constituted by a disc-shaped end plate 12 and a spiral wrap portion 14 that stands upright from the end plate 12 in a right-angle direction.
  • the aluminum orbiting scroll 20 is similarly constituted by a disc-shaped end plate 22 and a spiral wrap portion 24 that stands upright from the end plate 22 in a right-angle direction.
  • Spiral recessed grooves 16 are engraved in respective end surfaces of the wrap portions 14 and 24 , and spiral tip seals 18 are fitted tightly into the recessed grooves 16 .
  • a clearance AC between the respective end plates 12 , 22 and the respective wrap portions 14 , 24 is tightly sealed by the tip seals 18 .
  • an elastic coating 28 is formed on a wrap portion side face 24 a in order to seal up a clearance RC between the wrap portions 14 , 24 such that an enclosed space s is formed between the fixed scroll 10 and the orbiting scroll 20 .
  • the elastic coating 28 is formed by applying a coating solution containing following components in a following composition to the wrap portion side face 24 a using a coating device shown in FIGS. 2 and 3 , drying the coating by baking so that the coating is hardened, and then breaking in the scroll type compressor so that the coating is formed on the wrap portion side face 24 a at a coating thickness enabling elastic deformation.
  • the coating solution contains 10 to 20% by weight of epoxy resin serving as a thermosetting resin, 20 to 30% by weight of MoS 2 , and 5 to 10% by weight of graphite, with the remainder constituted by an organic solvent.
  • a large number of radiator fins 26 are formed integrally with a back surface of the end plate 22 of the orbiting scroll 20 .
  • a rotation device 30 for rotating the orbiting scroll 20 is placed on a floor surface F.
  • the rotation device 30 includes a disc-shaped rotating table 32 having a larger diameter than the endplate 22 , a casing 34 attached to a lower portion of the rotating table 32 , and a driving device 36 housed in the casing 34 in order to rotate the rotating table 32 .
  • a coating solution spraying device 40 is fixed onto the floor surface F in the vicinity of the rotation device 30 .
  • the coating solution spraying device 40 includes a main body portion 41 having an inbuilt coating solution storage tank, not shown in the drawings, an inbuilt driving device 42 and the like that causes an arm 48 , to be described below, to reciprocate in a direction of an arrow, and a guiding frame 44 having a recessed groove 46 along which the arm 48 slides in the direction of the arrow.
  • the recessed groove 46 is disposed in a horizontal direction and has a rectilinear groove shape.
  • the arm 48 is engaged to the recessed groove 46 to be free to slide in the direction of the arrow, and thus the arm 48 is moved by the driving device 42 in the direction of the arrow while remaining oriented toward the orbiting scroll 20 side.
  • a downwardly oriented nozzle pipe 50 is attached to a tip end of the arm 48 .
  • the aforesaid coating solution is supplied to the nozzle pipe 50 from the main body portion 41 side.
  • a spray nozzle 52 for discharging the coating solution is attached to a lower end of the nozzle pipe 50 .
  • the spray nozzle 52 is bent diagonally downward from the nozzle pipe 50 such that a circular coating solution discharge port opposes the wrap portion side face 24 a of the orbiting scroll 20 .
  • the spray nozzle 52 moves while maintaining an identical attitude. In other words, there is no need to provide a mechanism for modifying the attitude of the spray nozzle 52 .
  • the arm. 48 moves in the horizontal direction along a rectilinear movement path L by moving along the recessed groove 46 .
  • a controller 54 controls a rotation angle speed of the rotating table 32 by controlling the driving device 36 , and controls a movement speed of the spray nozzle 52 in the direction of the rectilinear movement path L by controlling the driving device 42 .
  • the orbiting scroll 20 is placed on the rotating table 32 and positioned such that a spiral center C of the wrap portion 24 is positioned in a rotary center of the rotating table 32 .
  • the spray nozzle 52 is disposed in the spiral center C, whereupon the attitude of the spray nozzle 52 is adjusted such that the coating solution discharge port opposes the wrap portion side face 24 a in the spiral center position.
  • the rotating table 32 is rotated in a direction of an arrow such that the coating solution is discharged from the spray nozzle 52 and sprayed onto the wrap portion side face 24 a.
  • the spray nozzle 52 is then moved along the rectilinear movement path L toward a radial direction outer side of the orbiting scroll 20 in while maintaining attitude thereof at the start of the spraying process.
  • the controller 54 controls the movement speed of the spray nozzle 52 to a constant speed, and gradually reduces the rotation angle speed of the rotating table 32 in accordance with the movement of the spray nozzle 52 in an outer peripheral direction of the orbiting scroll 20 from the spiral center C while keeping a distance between the nozzle tip end and the wrap portion side face 24 a constant. If the orbiting scroll 20 is rotated at an identical rotation angle speed throughout the coating solution application process, a peripheral speed of the orbiting scroll 20 increases steadily in the outer peripheral direction from the spiral center C. As a result, a coating thickness of the coating solution applied to the wrap portion side face 24 a decreases steadily from a central region toward an outside region.
  • the controller 54 controls the coating thickness to remain even from the central region to the outside region of the wrap portion side face 24 a by gradually reducing the rotation angle speed of the rotating table 32 in accordance with the radial direction movement of the spray nozzle 52 .
  • an identical operation is performed again so that the entire wrap portion side face is coated.
  • the coating solution need only be applied to the wrap portion side face that contacts the wrap portion 24 of the orbiting scroll 20 .
  • the coating is dried by baking, whereby the organic solvent evaporates and the epoxy resin hardens.
  • the coating thickness of the elastic coating 28 thus formed on the wrap portion side face 24 a of the orbiting scroll 20 is set to exceed the coating thickness that enables elastic deformation during an operation of the scroll type compressor.
  • the scroll type compressor is broken in to finish the elastic coating 28 from a coating thickness that causes plastic deformation to the coating thickness that enables elastic deformation in accordance with the clearance RC between the wrap portion side faces. In so doing, the coating thickness of the coating solution does not have to be controlled finely during the application process.
  • the elastic coating 28 is finished to the coating thickness that enables elastic deformation from the coating thickness that causes plastic deformation either by plastically deforming the elastic coating 28 on the wrap portion side face 24 a or by scraping away or wearing down a surface of the elastic coating 28 on the opposing wrap portion side face.
  • a scroll type air compressor including the elastic coating 28 having the components and composition described above on one side face of the wrap portion 24 was operated, whereupon a damaged condition of the wrap portion 24 and a sealing condition between the wrap portion side faces were inspected. Results are shown in FIG. 4 .
  • the clearance RC between the wrap portion side faces of the fixed scroll 10 and the orbiting scroll 20 was changed variously, the elastic coating 28 was formed at different coating thicknesses by performing the coating formation process described above in accordance with the clearances RC, and the inspection was performed using the formed elastic coatings 28 .
  • composition range of the solid lubricant when the composition range of the solid lubricant is smaller than the aforesaid composition range, the lubricating property and the sliding property relative to the wrap portion side face decrease, and when the composition range of the solid lubricant is greater than the aforesaid composition range, the strength of the elastic coating and the adhesive force thereof relative to the wrap portion side face decrease. It was therefore learned that the strength, lubricating property, sliding property, and adhesive strength of the elastic coating relative to the wrap portion side face can be optimized within the aforesaid composition range of the solid lubricant.
  • polytetrafluoroethylene may be added to the epoxy resin within the range of the aforesaid composition range.
  • a solid lubricant constituted by MoS 2 alone may be used as the solid lubricant within the range of the aforesaid composition range.
  • MoS 2 and graphite are self-lubricating, and therefore, when the present invention is applied to a non-lubricated scroll type air compressor, as in this embodiment, a lubricating property can be maintained between the wrap portions even without the use of lubricating oil.
  • the elastic coating 28 can be formed on the wrap portion side face 24 a of the orbiting scroll 20 at an even coating thickness from the spiral center C to the outside end. Moreover, the movement speed of the spray nozzle 52 remains constant, and therefore even thickness of the elastic coating 28 can be realized by simple control in which only the rotation angle speed of the rotating table 32 is controlled. Since complicated control is not required, a simple and inexpensive control device can be used as the control device.
  • the spray nozzle 52 is simply moved rectilinearly along the rectilinear movement path L while maintaining attitude thereof at the start of the application process. Therefore, a uniaxial system driving mechanism may be used as a mechanism for driving the spray nozzle 52 .
  • the configuration of the driving device 42 of the coating solution spraying device 40 can be simplified, enabling a reduction in cost.
  • an operation start position of the spray nozzle 52 is set as the spiral center C of the wrap portion 24 , and once the coating solution spraying process has begun, the spray nozzle 52 is moved in the outer peripheral direction of the orbiting scroll 20 .
  • the start position of the spray nozzle 52 maybe set as the outside end of the wrap portion 24 , and once the coating solution spraying process has begun, the spray nozzle 52 may be moved toward the spiral center C side of the orbiting scroll 20 .
  • the rotation angle speed of the rotating table 32 is gradually increased in accordance with the movement speed of the spray nozzle 52 .
  • the coating solution spraying device 40 that moves the arm 48 using a uniaxial system driving mechanism is employed, but instead, the arm 48 may be moved three-dimensionally using a multiaxial system driving mechanism.
  • a discharge port 58 of a spray nozzle 56 takes the shape of an elongated slit extending in a vertical direction.
  • a dimension h 2 of a long side of the discharge port 58 is set to be substantially identical to a height dimension h 1 of the wrap portion side face 24 a.
  • the elastic coating is formed on the wrap portion of the orbiting scroll
  • the elastic coating may be formed on the wrap portion of the fixed scroll instead.
  • the present invention may be applied to other scroll type fluid machines.
  • an elastic coating can be formed easily on a wrap portion side face of a scroll type fluid machine while maintaining a tight seal between wrap portion side faces and preventing seizure, galling, wear, contact damage, and the like between wrap portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US13/940,660 2011-01-14 2013-07-12 Scroll type fluid machine, method and device for forming elastic coating thereon Abandoned US20130302200A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/388,964 US20170167486A1 (en) 2011-01-14 2016-12-22 Scroll type fluid machine, method and device for forming elastic coating thereon

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011006386A JP4824833B1 (ja) 2011-01-14 2011-01-14 スクロール式流体機械、及びその弾性被膜形成方法及び装置
JP2011-006386 2011-01-14
PCT/JP2011/077753 WO2012096068A1 (ja) 2011-01-14 2011-12-01 スクロール式流体機械、及びその弾性被膜形成方法及び装置

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/077753 Continuation WO2012096068A1 (ja) 2011-01-14 2011-12-01 スクロール式流体機械、及びその弾性被膜形成方法及び装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/388,964 Division US20170167486A1 (en) 2011-01-14 2016-12-22 Scroll type fluid machine, method and device for forming elastic coating thereon

Publications (1)

Publication Number Publication Date
US20130302200A1 true US20130302200A1 (en) 2013-11-14

Family

ID=45327121

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/940,660 Abandoned US20130302200A1 (en) 2011-01-14 2013-07-12 Scroll type fluid machine, method and device for forming elastic coating thereon
US15/388,964 Abandoned US20170167486A1 (en) 2011-01-14 2016-12-22 Scroll type fluid machine, method and device for forming elastic coating thereon

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/388,964 Abandoned US20170167486A1 (en) 2011-01-14 2016-12-22 Scroll type fluid machine, method and device for forming elastic coating thereon

Country Status (5)

Country Link
US (2) US20130302200A1 (ja)
EP (1) EP2650542B1 (ja)
JP (1) JP4824833B1 (ja)
CN (1) CN103228920B (ja)
WO (1) WO2012096068A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20130452A1 (it) 2013-03-26 2014-09-27 Riem Service S R L Processo per la rigenerazione del gruppo pompante di un compressore volumetrico a vite del tipo "oil-free".
JP6792072B2 (ja) * 2017-05-15 2020-11-25 株式会社日立産機システム スクロール式流体機械
CN112718309B (zh) * 2020-12-23 2022-07-05 翰贝摩尔表面技术（江苏）有限公司 电子材料表面处理的陶瓷颗粒湿法喷涂设备及其喷涂方法
CN112981286B (zh) * 2021-04-21 2021-10-12 中国航发北京航空材料研究院 一种铝合金厚板的孔挤压强化方法和所述方法用润滑剂
KR102395127B1 (ko) * 2021-11-29 2022-05-09 (주)대한스프레이시스템 스크롤 압축기의 코팅방법과 그 코팅장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802831A (en) * 1986-04-11 1989-02-07 Hitachi, Ltd. Fluid machine with resin-coated scroll members
JPH0724633Y2 (ja) * 1989-05-12 1995-06-05 岩田塗装機工業株式会社 スクロール圧縮機
US5468130A (en) * 1993-08-23 1995-11-21 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Coating structure for a movable member in a compressor
BE1010426A3 (nl) * 1996-07-16 1998-07-07 Atlas Copco Airpower Nv Werkwijze voor het vervaardigen van een spiraalcompressor.
US6783338B2 (en) * 2001-08-01 2004-08-31 Kabushiki Kaisha Toyota Jidoshokki Scroll type compressor having tip seals and a scroll coating layer
US7331274B2 (en) * 2004-05-21 2008-02-19 Kabushiki Kaisha Toyota Jidoshokki Sliding film, sliding member, composition for sliding film, sliding device, swash-plate type compressor, process for forming sliding film, and process for producing sliding member
US7785088B2 (en) * 2007-01-31 2010-08-31 Hitachi, Ltd. Scroll fluid machine with a coating layer

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615867B2 (ja) * 1987-09-09 1994-03-02 株式会社日立製作所 スクロール圧縮機
JPH02145687A (ja) * 1988-11-26 1990-06-05 Sumitomo Metal Ind Ltd コークス炉の乾留方法
JPH08189482A (ja) * 1995-01-12 1996-07-23 Kobe Steel Ltd スクロール圧縮機
JPH0988851A (ja) * 1995-09-29 1997-03-31 Ntn Corp 容積形圧縮機のスクロール部材の製造方法
JPH11280669A (ja) 1998-03-25 1999-10-15 Tokico Ltd スクロール式流体機械
US6224357B1 (en) * 1998-09-29 2001-05-01 Tokioco Ltd. Scroll fluid machine having an orbiting radius varying mechanism and a clearance between the wrap portions
KR100585448B1 (ko) * 1999-04-08 2006-06-02 동경 엘렉트론 주식회사 막 형성방법 및 막 형성장치
JP3782279B2 (ja) * 1999-04-08 2006-06-07 東京エレクトロン株式会社 膜形成方法及び膜形成装置
JP2003035284A (ja) 2001-07-25 2003-02-07 Hitachi Ltd スクロール型ポンプの部材の表面被覆方法
CN101422776A (zh) * 2001-10-26 2009-05-06 康奈可压缩机株式会社 涂覆碳氟树脂的方法
JP2003211084A (ja) * 2001-10-26 2003-07-29 Seiko Instruments Inc フッ素系樹脂コーティング方法およびこの方法を用いた摺動部材、気体圧縮機
JP4510495B2 (ja) * 2004-03-30 2010-07-21 アネスト岩田株式会社 スクロール流体機械
JP5042466B2 (ja) * 2005-05-31 2012-10-03 大豊工業株式会社 直受コンロッド及びその製造方法
JP2007245234A (ja) 2006-01-26 2007-09-27 Daikin Ind Ltd 圧縮機の摺動部品の製造方法および圧縮機
JP4949824B2 (ja) * 2006-12-28 2012-06-13 株式会社日立産機システム スクロール式流体機械
CN101784942A (zh) * 2007-08-23 2010-07-21 Hoya株式会社 塑料镜片的制造方法
JP2009057897A (ja) 2007-08-31 2009-03-19 Hitachi Ltd スクロール式流体機械

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802831A (en) * 1986-04-11 1989-02-07 Hitachi, Ltd. Fluid machine with resin-coated scroll members
JPH0724633Y2 (ja) * 1989-05-12 1995-06-05 岩田塗装機工業株式会社 スクロール圧縮機
US5468130A (en) * 1993-08-23 1995-11-21 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Coating structure for a movable member in a compressor
BE1010426A3 (nl) * 1996-07-16 1998-07-07 Atlas Copco Airpower Nv Werkwijze voor het vervaardigen van een spiraalcompressor.
US6783338B2 (en) * 2001-08-01 2004-08-31 Kabushiki Kaisha Toyota Jidoshokki Scroll type compressor having tip seals and a scroll coating layer
US7331274B2 (en) * 2004-05-21 2008-02-19 Kabushiki Kaisha Toyota Jidoshokki Sliding film, sliding member, composition for sliding film, sliding device, swash-plate type compressor, process for forming sliding film, and process for producing sliding member
US7785088B2 (en) * 2007-01-31 2010-08-31 Hitachi, Ltd. Scroll fluid machine with a coating layer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Machine translation of JP 11-280669A, of Toshikazu Harashima, translation date 9/18/2016 *

Also Published As

Publication number Publication date
US20170167486A1 (en) 2017-06-15
EP2650542A1 (en) 2013-10-16
EP2650542A4 (en) 2014-08-27
EP2650542B1 (en) 2018-02-07
CN103228920A (zh) 2013-07-31
WO2012096068A1 (ja) 2012-07-19
CN103228920B (zh) 2016-11-09
JP4824833B1 (ja) 2011-11-30
JP2012149519A (ja) 2012-08-09

Similar Documents

Publication Publication Date Title
US20170167486A1 (en) Scroll type fluid machine, method and device for forming elastic coating thereon
CN104662199B (zh) 用于压缩机磨损表面的抗磨损涂层
US7615291B2 (en) Coating material having heat and abrasion resistance and low friction characteristics
JP6030822B2 (ja) 斜板式コンプレッサの斜板および斜板式コンプレッサ
JP5385873B2 (ja) 冷媒圧縮機
US8070873B2 (en) Medium temperature coating material for high speed turbomachinery and method of coating same
US9808894B2 (en) Swash plate of a swash plate type compressor and the swash plate type compressor
CN105132086B (zh) 聚四氟乙烯基粘结固体润滑剂
KR20060024423A (ko) 습동부재, 습동부재의 제조방법 및 습동부재용 도료
KR20100092026A (ko) 스러스트 베어링용 슬라이딩 부재
JP2014501889A (ja) 摩擦対および摩擦対での表面処理のプロセス
CN106151029A (zh) 涡旋压缩机以及用于涡旋压缩机的驱动轴和卸载衬套
US9427771B2 (en) Method for forming coating on scroll type fluid machine
CN104471246A (zh) 斜板式压缩机的斜板及其制造方法以及斜板式压缩机
JP2008180374A (ja) 転がり軸受
KR101786103B1 (ko) 컴프레서의 사판 표면처리 방법과 그 코팅액
WO2018092854A1 (ja) 冷媒圧縮機及びそれを備えた冷凍装置
WO2018181730A1 (ja) 斜板式コンプレッサの斜板およびその製造方法、並びに斜板式コンプレッサ
JPH10246192A (ja) 圧縮機内摺動部材用複層乾性潤滑被膜およびその被膜を用いた装置
JP5938549B2 (ja) 摺動部材及びその製造方法
JP2018173078A (ja) 斜板式コンプレッサの斜板およびその製造方法、並びに斜板式コンプレッサ
JPH10246191A (ja) 圧縮機用摺動装置およびその装置を用いた空調装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: ANEST IWATA CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ASAMI, JUNICHI;SATO, TORU;REEL/FRAME:030787/0269

Effective date: 20130617

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION