EP3786452A1 - Oldham-ring und spiralverdichter - Google Patents

Oldham-ring und spiralverdichter Download PDF

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Publication number
EP3786452A1
EP3786452A1 EP19792850.0A EP19792850A EP3786452A1 EP 3786452 A1 EP3786452 A1 EP 3786452A1 EP 19792850 A EP19792850 A EP 19792850A EP 3786452 A1 EP3786452 A1 EP 3786452A1
Authority
EP
European Patent Office
Prior art keywords
oldham
connecting portion
straight linear
key
oldham ring
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.)
Pending
Application number
EP19792850.0A
Other languages
English (en)
French (fr)
Other versions
EP3786452A4 (de
Inventor
Yoshiki Kobayashi
Yogo Takasu
Hajime Sato
Masahiro Taniguchi
Kazuki Takahashi
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.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems Ltd
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 Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP3786452A1 publication Critical patent/EP3786452A1/de
Publication of EP3786452A4 publication Critical patent/EP3786452A4/de
Pending legal-status Critical Current

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Classifications

    • 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
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/06—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
    • F01C17/066—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with an intermediate piece sliding along perpendicular axes, e.g. Oldham coupling
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement

Definitions

  • the present invention relates to an Oldham ring and a scroll compressor.
  • the present application claims priority based on Japanese Patent Application No. 2018-084536 filed in Japan on April 25, 2018, the contents of which are incorporated herein by reference.
  • Scroll compressors that compress fluids (refrigerants) are used in air conditioners, refrigerators, and the like.
  • the scroll compressor rotates the orbiting scroll so as to revolve with respect to the fixed scroll and compresses the fluid by reducing the capacity of the compression chamber formed between the fixed scroll and the orbiting scroll.
  • the scroll compressor has an Oldham ring for suppressing the rotation of the orbiting scroll.
  • the Oldham ring has an Oldham key.
  • Patent Document 1 discloses an Oldham ring having an oval shape from the viewpoint of reducing the size of the Oldham ring and the orbiting scroll.
  • the Oldham ring disclosed in Patent Document 1 has a pair of straight linear portions, a first arc portion connecting one end of the pair of straight linear portions, and a second arc portion connecting the other ends of the pair of straight linear portions. It has a part, a first Oldham key provided in each of the pair of straight linear portions and inserted into the groove of the end plate of the orbiting scroll, and a second Oldham key provided in each of the first and second arc portions.
  • the first Oldham key is arranged on one side of the Oldham ring in the axial direction.
  • the first Oldham key is arranged in the circumferential direction of the Oldham ring and has a first pressure-receiving surface that receives a load from the orbiting scroll.
  • the second Oldham key is located on the other side of the Oldham ring in the axial direction.
  • the second Oldham key has a second pressure-receiving surface arranged in the circumferential direction of the Oldham ring. From the viewpoint of reducing the size of the Oldham ring and the orbiting scroll, the distance between the pair of straight linear portions is configured to be smaller than the distance between the first arc and the second arc.
  • the Oldham ring disclosed in Patent Document 1 is configured such that the distance between the pair of straight linear portions is smaller than the distance between the first arc and the second arc.
  • the distance between the pair of first Oldham keys is smaller than the distance between the pair of second Oldham rings.
  • an object of the present invention is to provide an Oldham ring and a scroll compressor capable of reducing the size and weight of the Oldham ring and the orbiting scroll while suppressing damage to the first Oldham key.
  • An Oldham ring according to an aspect of the present invention includes: an Oldham ring main body provided with a pair of straight linear portions extending in the first direction and facing each other in a second direction orthogonal to the first direction, a first connecting portion connecting one end of the pair of straight linear portions and a second connecting portion connecting the other end of the pair of straight linear portions and facing the first connecting portion in the first direction; a first Oldham key provided on each of the surfaces of the pair of straight linear portions arranged on one side of an axis of the Oldham ring main body orthogonal to the first direction and the second direction and having a first pressure-receiving surface arranged in the circumferential direction of the Oldham ring main body, and receiving a load; and a second Oldham key provided on each of the surfaces of the first connecting portion and the second connecting portion arranged on the other side of the axis and having a second pressure-receiving surface arranged in the circumfer
  • the first distance between the pair of straight linear portions in the second direction is made shorter than the second distance between the first connecting portion and the second connecting portion in the first direction. This makes it possible to reduce the size of the Oldham ring and the orbiting scroll in the second direction.
  • the area of the first pressure-receiving surface of the first Oldham key, which is shorter than the axis of the Oldham ring main body, larger than the area of the second pressure-receiving surface of the second Oldham key It is possible to reduce the surface pressure of the first pressure-receiving surface that receives a load larger than the load received by the second pressure-receiving surface, and prevent the first Oldham key from being damaged.
  • the height of the first Oldham key may be higher than the height of the second Oldham key in the axial direction in which the axis extends.
  • the area of the first pressure-receiving surface in the second direction can be larger than the area of the second pressure-receiving surface without increasing the size of the Oldham ring.
  • the length of the first Oldham key in the second direction may be longer than the length of the second Oldham key in the first direction.
  • the area of the first pressure-receiving surface can be made larger than the area of the second pressure-receiving surface.
  • the width of the first Oldham key in the first direction may be wider than the width of the second Oldham key in the second direction.
  • the first Oldham key may be arranged so as not to protrude outward from the outer surface of the straight linear portion.
  • the first connecting portion and the second connecting portion each have a circular arc shape.
  • the stress received by the first connecting portion and the second connecting portion can be reduced as compared with the case where the first connecting portion and the second connecting portion are formed in a linear shape.
  • an area of the cut surface of the straight linear portion formed by cutting the straight linear portion in a plane orthogonal to the first direction may be larger than a first area of a cut surface of the first connecting portion formed by cutting the first connecting portion in a plane orthogonal to the extending direction of the first connecting portion and a second area of a cut surface of the second connecting portion formed by cutting the second connecting portion in a plane orthogonal to the extending direction of the second connecting portion.
  • the straight linear portion is more susceptible to greater stress than the arcuate first and second connecting portions.
  • the cross section of the straight linear portion larger than the first cross section of the first connecting portion and the second cross section of the second connecting portion, the strength of the straight linear portion is improved and damage to the straight linear portion can be prevented.
  • the first connecting portion and the second connecting portion may be provided with an inner peripheral surface connected to the inner surfaces of the pair of straight linear portions and having a semicircular shape when viewed from the axial direction in which the axis extends, and an outer peripheral surface connected to the outer surfaces of the pair of straight linear portions and having a semicircular shape when viewed from the axial direction, the intermediate position of the inner peripheral surface and the outer peripheral surface of the first connecting portion is matched with the intermediate position of straight line connecting one end of the pair of straight linear portions connected to the first connecting portion, the intermediate position of the inner peripheral surface and the outer peripheral surface of the second connecting portion may be matched with the intermediate position of straight line connecting the other end of the pair of straight linear portions connected to the second connecting portion.
  • the inner surface of the pair of straight linear portions and the inner peripheral surface of the first connecting portion can be connected by a smooth surface
  • the outer surface of the pair of straight linear portions and the outer peripheral surface of the first connecting portion can be connected by a smooth surface
  • the inner surface of the pair of straight linear portions and the inner peripheral surface of the second connecting portion can be connected by a smooth surface
  • the outer surface of the pair of straight linear portions and the outer peripheral surface of the second connecting portion can be connected by a smooth surface
  • the Oldham ring includes a Oldham ring main body provided with a pair of straight linear portions extending in the first direction and facing each other in a second direction orthogonal to the first direction, a first connecting portion connecting one end of the pair of straight linear portions, and a second connecting portion connecting the other end of the pair of straight linear portions and facing the first connecting portion in the first direction; a first Oldham key is provided on each of the surfaces of the pair of straight linear portions arranged on one side of an axis of the Oldham ring main body orthogonal to the first direction and the second direction; and a second Oldham key is provided on each of the surfaces of the first connecting portion and the second connecting portion arranged on the other side of the axis, wherein a first distance between the pair of straight linear portions in the second direction is shorter than a second distance between the first connecting portion and the second connecting portion in the first direction, and the first Oldham key is arranged so as not to protrude outward from the outer surface of the straight linear portion.
  • the size of the Oldham ring and the orbiting scroll in the second direction can be further reduced.
  • the first Oldham key may have a first pressure-receiving surface arranged in the circumferential direction of the Oldham ring main body
  • the second Oldham key may have a second pressure-receiving surface arranged in the circumferential direction of the Oldham ring main body
  • the height of the first Oldham key in the axial direction in which the axis of the Oldham ring main body extends may be higher than the height of the second Oldham key in the axial direction.
  • the first pressure-receiving surface can make the area of the second pressure-receiving surface larger than the area of the second pressure-receiving surface without increasing the size of the Oldham ring.
  • the surface pressure received by the first pressure-receiving surface due to the load can be reduced, and damage to the first Oldham key can be suppressed.
  • the scroll compressor is a scroll compressor that compresses a fluid, and includes the Oldham ring, a shaft extending in the axial direction in which the axis of the Oldham ring main body extends; an orbiting scroll provided on the shaft and including an end plate in which formed with a groove into which the first Oldham key is inserted; a fixed scroll provided opposite to the orbiting scroll and forming a compression chamber for compressing the fluid between the rotating scroll; and a housing for housing the Oldham ring, the shaft, the orbiting scroll and the fixed scroll.
  • the gap formed between the structure composed of the miniaturized Oldham ring and the orbiting scroll and the inner surface of the housing can be made large, so that the fluid can be easily moved in the direction in which the shaft extends.
  • O indicates the axis of the shaft main body 35 (hereinafter referred to as “axis O")
  • O1 indicates the eccentric axis of the eccentric shaft 36 (hereinafter referred to as “eccentric axis O1”)
  • the X direction indicates the first direction
  • Z direction indicates the height directions of the scroll compressor 10.
  • the scroll compressor 10 includes a housing 11, a suction pipe 13, a discharge pipe 15, a main bearing 17, a sub bearing 19, a shaft 21, an oil supply pump 22, a drive unit 23, and a scroll compressor main body 24, a bush assembly 25, and an Oldham ring 27.
  • the housing 11 has a closed structure and has a hollow part inside the housing 11.
  • the housing 11 has a tubular part 31, a bottom part 32, and a cover portion 33.
  • the tubular part 31 is a member having a cylindrical shape and extends in the Z direction.
  • the upper and lower ends of the tubular part 31 are open ends.
  • the bottom part 32 is provided so as to close the lower end of the tubular part 31.
  • the cover portion 33 is provided so as to close the upper end of the tubular part 31.
  • the housing 11 houses a main bearing 17, a sub bearing 19, a shaft 21, an oil supply pump 22, a drive unit 23, a scroll compressor main body 24, a bush assembly 25, and an Oldham ring 27.
  • the inside of the housing 11 is divided by the scroll compressor main body 24 into a suction chamber 11A arranged below the scroll compressor main body 24 and a discharge chamber 11B arranged above the scroll compressor main body 24.
  • the suction pipe 13 is provided in the central part of the tubular part 31.
  • the suction pipe 13 communicates with the suction chamber 11A formed in the housing 11.
  • the suction pipe 13 causes a fluid (for example, a refrigerant gas which is a working fluid) to be introduced into the suction chamber 11A from the outside of the housing 11.
  • the discharge pipe 15 is provided on the cover portion 33.
  • the discharge pipe 15 communicates with the discharge chamber 11B.
  • the discharge pipe 15 is connected to, for example, a plurality of indoor units (not shown) to be used.
  • the fluid compressed by the scroll compressor main body 24 (hereinafter, referred to as "high pressure fluid") is discharged to the discharge pipe 15. Then, the discharged high-pressure fluid is supplied to the destination.
  • the main bearing 17 is fixed to the inner wall of the housing 11.
  • the main bearing 17 is arranged between the connecting position between the suction pipe 13 and the housing 11 and the scroll compressor main body 24.
  • the main bearing 17 supports one end 35A of the shaft main body 35 extending in the axis O direction in a rotatable state.
  • the shaft 21 has a shaft main body 35 and an eccentric shaft 36.
  • the shaft main body 35 has a cylindrical shape.
  • the shaft main body 35 has one end 35A arranged on the scroll compressor main body 24 side and the other end 35B arranged on the bottom 32 side.
  • the shaft main body 35 is supported by a main bearing 17 and a sub bearing 19 in a state of being rotatable around the axis O.
  • the eccentric shaft 36 is provided at one end 35A of the shaft main body 35.
  • the eccentric shaft 36 has an eccentric axis O1 offset (eccentric) with respect to the axis O as a central axis.
  • the eccentric shaft 36 is a columnar shaft smaller than the outer diameter of the shaft main body 35. The eccentric shaft 36 having such a configuration revolves around the axis O1 when the shaft main body 35 rotates around the axis O.
  • the oil supply pump 22 is provided below the sub bearing 19.
  • the oil supply pump 22 supplies lubricating oil to the bearing main body constituting the main bearing 17 and the sub bearing 19.
  • the drive unit 23 is housed in the housing 11.
  • the drive unit 23 is arranged so as to surround the outer peripheral surface of the central part of the rotary shaft main body 35.
  • the drive unit 23 rotates the shaft main body 35.
  • the scroll compressor main body 24 is provided between the main bearing 17 and the discharge chamber 11B.
  • the scroll compressor main body 24 has a fixed scroll 41 and an orbiting scroll 42.
  • the fixed scroll 41 is arranged between the orbiting scroll 42 and the discharge chamber 11B.
  • the fixed scroll 41 has an end plate 45 and a fixed scroll lap 46.
  • the end plate 45 is a disk-shaped plate material and is fixed to the inner wall of the housing 11.
  • the end plate 45 faces the orbiting scroll 42 arranged below the fixed scroll 41.
  • the end plate 45 has a discharge port 45A.
  • the discharge port 45A is a hole formed so as to penetrate the center of the end plate 45 and extends in the Z direction.
  • the discharge port 45A discharges the high-pressure fluid that has been compressed by the scroll compressor main body 24 into the discharge chamber 11B.
  • the fixed scroll lap 46 is provided on the surface (lower surface) of the end plate 45 facing the orbiting scroll 42.
  • the fixed scroll lap 46 is erected in the Z direction.
  • the fixed scroll lap 46 is a wall body formed in a spiral shape when viewed from the Z direction.
  • As the fixing lap 46 for example, a plate-shaped member wound around the center of the end plate 45 can be used.
  • the orbiting scroll 42 will be described with reference to FIGS. 1 and 2 .
  • the Y direction is the second direction, which is orthogonal to the X direction and the Z direction shown in FIG.1 .
  • the orbiting scroll 42 is arranged between the fixed scroll 41 and the main bearing 17.
  • the orbiting scroll 42 has an end plate 48, an orbiting scroll lap 49, a boss portion 51, and a groove 53.
  • the end plate 48 is a disk-shaped plate material and faces the end plate 45 in the Z direction.
  • the orbiting scroll lap 49 is provided on the surface of the end plate 48 facing the end plate 45.
  • the orbiting scroll lap 49 is erected in the Z direction.
  • the orbiting scroll lap 49 is a wall body formed in a spiral shape when viewed from the Z direction.
  • As the orbiting scroll lap 49 for example, a plate-shaped member wound around the center of the end plate 48 can be used.
  • the orbiting scroll lap 49 having the above configuration is arranged so as to mesh with the fixed scroll lap 46 described above.
  • a compression chamber 24A which is a space for compressing the fluid, is partitioned between the swirl lap 49 and the fixed scroll lap 46.
  • the volume of the compression chamber 24A changes as the orbiting scroll lap 49 swivels with respect to the fixed scroll 41.
  • the fluid (refrigerant) in the compression chamber 24A is compressed.
  • the boss portion 51 is provided at the center of the surface 48a of the end plate 48 facing the shaft 21.
  • the boss portion 51 is a cylindrical member and projects in the direction toward the sub bearing 19.
  • the boss portion 51 is arranged so as to surround the outer circumference of the eccentric shaft 36.
  • a bearing is provided on the inner peripheral surface of the boss portion 51. Lubricating oil is supplied to the bearing from the oil supply pump 22.
  • Two grooves 53 are formed on the surface 48a side of the end plate 48.
  • the two grooves 53 face each other with the boss portion 51 in between in a plan view.
  • the two grooves 53 extend to the outer circumference of the end plate 48.
  • the bush assembly 25 is provided between the orbiting scroll 42 and the shaft 21.
  • the bush assembly 25 connects the orbiting scroll 42 and the shaft 21.
  • the bush assembly 25 has a bush 25A provided between the eccentric shaft 36 and the boss portion 51.
  • C1 is an intermediate position of a straight line connecting one end 64A of the straight linear portion 64 and one end 65A of the straight linear portion 65 (hereinafter, referred to as “intermediate position C1")
  • C2 is the center position of the inner peripheral surface 67c and the outer peripheral surface 67d of the first connecting portion 67 formed in a semicircular shape (hereinafter referred to as "center position C2")
  • C3 is the intermediate position of the straight line connecting the other end 64B of the straight linear portion 64 and the other end 65B of the straight linear portion 65 (hereinafter referred to as “intermediate position C3")
  • C4 is the center position of the inner peripheral surface 68c and the outer peripheral surface 68d of the second connecting portion 68 formed in a semicircular shape (hereinafter referred to as "center position C4").
  • L1 is the length of the first Oldham key 57 in the Y direction (hereinafter, referred to as “length L1”)
  • L2 is the length of the first Oldham key 58 in the Y direction (hereinafter, “length L2”)
  • L3 is the length of the second Oldham key 61 in the X direction (hereinafter referred to as “length L3”)
  • L4 is the length of the second Oldham key 62 in the X direction (hereinafter referred to as "length L4").
  • O2 is the axis of the Oldham ring main body 55 (hereinafter, referred to as “axis O2")
  • G1 is the width of the straight linear portion 64 in the direction in which the straight linear portion 64 extends (hereinafter, referred to as “width G1")
  • G2 is the width of the straight linear portion 65 in the direction in which the straight linear portion 65 extends (hereinafter referred to as “width G2”)
  • G3 is the width of the first connecting portion 67 in the direction in which the first connecting portion 67 extends (hereinafter referred to as “width G3”)
  • G4 is the width of the second connecting portion 68 in the direction in which the second connecting portion 68 extends (hereinafter, referred to as "width G4").
  • W1 is the width of the first Oldham key 57 in the X direction (hereinafter referred to as “width W1”)
  • W2 is the width of the first Oldham key 58 in the X direction (hereinafter referred to as “width W2”)
  • W3 indicates the width of the second Oldham key 61 in the Y direction (hereinafter referred to as “width W3”)
  • W4 indicates the width of the second Oldham key 62 in the Y direction (hereinafter referred to as "width W4").
  • H1 is the height of the first Oldham key 57 in the axis O2 direction (Z direction) (hereinafter, referred to as "height H1")
  • H2 is height of the first Oldham key 58 in the axis O2 direction (Z direction) (hereinafter referred to as "height H2")
  • H3 is the height of the second Oldham key 61 in the axis O2 direction (Z direction) (hereinafter referred to as "height H3”)
  • H4 is the height of the second Oldham key 62 in the axis O2 direction (Z direction) (hereinafter, referred to as "height H4").
  • FIG.3 the same components as those of the structure shown in FIG.1 are designated by the same reference numerals.
  • FIGS.3 to 9 the same components are designated by the same reference numerals.
  • FIG.10 the same components as those of the structures shown in FIGS.2 and 3 are designated by the same reference numerals.
  • the Oldham ring 27 is a member for suppressing the rotation of the orbiting scroll 42 (rotation around the eccentric axis O1) and is provided between the orbiting scroll 42 and the main bearing 17.
  • the Oldham ring 27 has an Oldham ring main body 55, a first Oldham key 57, 58, and a second Oldham key 61, 62.
  • the Oldham ring main body 55 has A pair of straight linear portions 64 and 65, a first connecting portion 67, and a second connecting portion 68.
  • the straight linear portions 64 and 65 extend in the X direction (first direction), respectively.
  • the straight linear portions 64 and 65 are arranged so as to face each other in the Y direction (second direction) so as to be separated from each other.
  • the straight linear portion 64 has one end 64A and the other end 64B arranged in the X direction, surfaces 64a and 64b, an inner surface 64c, and an outer surface 64d.
  • the surface 64a is a surface arranged on one side of the axis O2, and a part of the surface 64a faces the orbiting scroll 42 in the Z direction.
  • the surface 64b is a surface arranged on the other side of the axis O2, and is arranged on the opposite side of the surface 64a.
  • the inner surface 64c is a surface facing the straight linear portion 65 in the Y direction.
  • the outer surface 64d is a surface arranged on the opposite side of the inner surface 64c.
  • the cut surface 64e of the straight linear portion 64 formed by cutting the straight linear portion 64 on a plane (virtual plane) orthogonal to the X direction is a rectangle.
  • the width of the straight linear portion 64 in the Y direction is the width G1.
  • the thickness of the straight linear portion 64 in the Z direction is set to the thickness M1.
  • the straight linear portion 65 has one end 65A and the other end 65B arranged in the X direction, surfaces 65a and 65b, an inner surface 65c, and an outer surface 65d.
  • the surface 65a is a surface arranged on one side of the axis O2, and a part of the surface 65a faces the orbiting scroll 42 in the Z direction.
  • the surface 65b is a surface arranged on the other side of the axis O2, and is arranged on the opposite side of the surface 65a.
  • the inner surface 65c is a surface facing the straight linear portion 64 in the Y direction.
  • the outer surface 65d is a surface arranged on the opposite side of the inner surface 65c.
  • the cut surface 65e of the straight linear portion 65 formed by cutting the straight linear portion 65 on a plane (virtual plane) orthogonal to the X direction is rectangular.
  • the width G2 of the straight linear portion 65 in the Y direction is configured to be equal to the width G1 of the straight linear portion 64.
  • the thickness M2 of the straight linear portion 65 in the Z direction is configured to be equal to the thickness M1 of the straight linear portion 64.
  • the first connecting portion 67 connects one end 64A of the straight linear portion 64 and one end 65A of the straight linear portion 65.
  • the first connecting portion 67 is a member having an arc shape.
  • the stress received by the first connecting portion 67 can be reduced as compared with the case where the first connecting portion 67 is formed in a linear shape.
  • the first connecting portion 67 has surfaces 67a and 67b, an inner peripheral surface 67c, and an outer peripheral surface 67d.
  • the surface 67a is a surface arranged on one side of the axis O2.
  • the surface 67b is a surface arranged on the other side of the axis O2 and is arranged on the opposite side of the surface 67a.
  • the inner peripheral surface 67c is a surface connected to the inner surfaces 64c and 65c of the straight linear portions 64 and 65.
  • the inner peripheral surface 67c has a semicircular shape when viewed from the axis O2 direction.
  • the center position C2 of the inner peripheral surface 67c and the outer peripheral surface 67d of the first connecting portion 67 is matched with the intermediate position C1 of the straight line connecting one end 64A of the straight linear portion 64 and one end 65A of the straight linear portion 65.
  • the width G3 of the straight linear portion 64 orthogonal to the extending direction of the first connecting portion 67 is configured to be equal to the widths G1 and G2 of the straight lines 64 and 65.
  • the stress received by the second connecting portion 68 can be reduced as compared with the case where the second connecting portion 68 is formed in a linear shape.
  • the inner peripheral surface 68c is a surface connected to the inner surfaces 64c and 65c of the straight linear portions 64 and 65.
  • the inner peripheral surface 68c has a semicircular shape when viewed from the axis O2 direction.
  • the outer peripheral surface 68d is a surface connected to the outer surfaces 64d and 65d of the straight linear portions 64 and 65.
  • the outer peripheral surface 68d has a semicircular shape when viewed from the axis O2 direction.
  • the center position C4 of the inner peripheral surface 68c and the outer peripheral surface 68d of the second connecting portion 68 coincides with the intermediate position C3 of the straight line connecting the other end 64B of the straight linear portion 64 and the other end 65B of the straight linear portion 65.
  • the cut surface 68e of the second connecting portion 68 formed by cutting the second connecting portion 68 on a plane (virtual surface) orthogonal to the extending direction of the second connecting portion 68 is formed to be rectangular.
  • the thickness M4 of the second connecting portion 68 in the Z direction is configured to be equal to the thicknesses M1 and M2 of the straight linear portions 64 and 65 and the thickness M3 of the first connecting portion 67.
  • the first Oldham key 57 is provided on the surface 64a located at the center of the straight linear portion 64.
  • the first Oldham key 57 is inserted into one of the two grooves 53 of the orbiting scroll 42.
  • the first Oldham key 57 is arranged in the circumferential direction of the Oldham ring main body 55 and has a first pressure-receiving surface 57a for receiving a load.
  • the first Oldham key 57 projects to the outside of the outer surface 64d of the straight linear portion 64.
  • the length L1 of the first Oldham key 57 in the Y direction is configured to be larger than the width G1 of the straight linear portion 64.
  • the first Oldham key 58 is provided on the surface 65a located at the center of the straight linear portion 65.
  • the first Oldham key 58 faces the first Oldham key 57 in the Y direction.
  • the first Oldham key 58 is inserted into the other groove 53 of the two grooves 53 of the orbiting scroll 42.
  • the first Oldham key 58 projects to the outside of the outer surface 65d of the straight linear portion 65.
  • the length L2 of the first Oldham key 58 in the Y direction is configured to be larger than the width G2 of the straight linear portion 65.
  • the width W2 of the first Oldham key 58 in the X direction is configured to be equal to the width W1 of the first Oldham key 57. Further, the height H2 of the first Oldham key 58 is configured to be equal to the height H1 of the first Oldham key 57.
  • the lengths L1 and L2 of the first Oldham keys 57 and 58 are configured to be longer than the lengths L3 and L4 of the second Oldham keys 61 and 62.
  • the second Oldham key 61 is provided on a surface 67a located at the center of the first connecting portion 67.
  • the second Oldham key 61 is inserted into a groove (not shown) formed in the fixed scroll 41.
  • the second Oldham key 61 is arranged in the circumferential direction of the Oldham ring main body 55 and has a second pressure-receiving surface 61a for receiving a load.
  • the second Oldham key 61 projects outward from the outer peripheral surface 67d of the first connecting portion 67 in the X direction.
  • the length L3 of the second Oldham key 61 in the X direction is configured to be larger than the width G3 of the first connecting portion 67.
  • the second Oldham key 62 is provided on a surface 68a located at the center of the second connecting portion 68.
  • the second Oldham key 62 faces the second Oldham key 61 in the X direction.
  • the second Oldham key 62 is inserted into a groove (not shown) formed in the fixed scroll 41.
  • the second Oldham key 62 is arranged in the circumferential direction of the Oldham ring main body 55 and has a second pressure-receiving surface 62a that receives a load.
  • the width W4 of the second Oldham key 62 in the Y direction is configured to be equal to the widths W1 and W2 of the first Oldham keys 57 and 58 and the width W3 of the second Oldham key 61.
  • the first distance D1 between the pair of straight linear portions 64, 65 in the Y direction is configured to be shorter than the second distance D2 between the first connecting portion 67 and the second connecting portion 68 in the X direction.
  • the first distance D1 between the pair of straight linear portions 64, 65 in the Y direction is made shorter than the second distance D2 between the first connecting portion 67 and the second connecting portion 68 in the X direction. This makes it possible to reduce the size of the Oldham ring 27 and the orbiting scroll 42 in the Y direction.
  • the Oldham ring 27 and the orbiting scroll 42 can be made smaller and lighter.
  • the first pressure-receiving surfaces 57a and 58a receive a load larger than the load received by the second pressure-receiving surfaces 61a and 62a.
  • the lengths L1 and L2 of the first Oldham keys 57 and 58 are configured to be longer than the lengths L3 and L4 of the second Oldham keys 61 and 62.
  • the surface pressure (surface pressure due to the load) of the first pressure-receiving surfaces 57a, 58a that receives a load larger than the load received by the second pressure-receiving surfaces 61a, 62a is reduced, and the first Oldham key 57 damage can be suppressed.
  • the first distance D1 between the pair of straight linear portions 64, 65 in which the first Oldham keys 57, 58 are arranged is shorter than the second distance D2 between the first connecting portion 67 in which the second Oldham key 61 is arranged and the second connecting portion 68 in which the second Oldham key 62 is arranged, the size and weight of the Oldham ring 27 and the orbiting scroll 42 can be reduced.
  • the widths G1 and G2 of the straight linear portions 64, 65 and the widths G3 and G4 of the first and second connecting portions 67 and 68 are equal has been described ,but for example, the thicknesses M1 and M2 of the straight linear portions 64 and 65 are made thicker than the thicknesses M3 and M4 of the first and second connecting portions 67 and 68, or the widths G1 and G2 of the straight linear portions 64 and 65 are made wider than the widths of the first and second connecting portions 67 and 68, is used, the cross-sectional area of the cut surfaces 64e and 65e of the straight linear portions 64 and 65 may be made larger than the first cross-sectional area of the cut surface 67e of the first connecting portion 67 and the second cross-sectional area of the cut surface 68e of the second connecting portion
  • the Oldham Ring 75 of the second embodiment will be described with reference to FIGS. 11 and 12 .
  • the Oldham ring 75 is configured in the same manner as the Oldham ring 27 of the first embodiment except that it has the first Oldham keys 76, 77 in place of the first Oldham keys 57, 58 constituting the Oldham ring 27.
  • the length L5 of the first Oldham key 76 can be made the same length as the lengths L3 and L4 of the second Oldham keys 61 and 62, for example.
  • the first Oldham key 76 is arranged in the circumferential direction of the Oldham ring main body 55 and has a first pressure-receiving surface 76a having a larger area than the second pressure-receiving surfaces 61a and 62a.
  • the length L6 of the first Oldham key 77 can be made the same length as the lengths L3 and L4 of the second Oldham keys 61 and 62 and the length L5 of the first Oldham key 76, for example.
  • the first Oldham key 77 is arranged in the circumferential direction of the Oldham ring main body 55 and has a first pressure-receiving surface 77a having a larger area than the second pressure-receiving surfaces 61a and 62a.
  • the Oldham Ring 75 of the second embodiment by making the heights H5 and H6 of the first Oldham keys 76, 77 higher than the heights H3 and H4 of the second Oldham keys 61, 62 without making the lengths L5 and L6 of the first Oldham keys 76, 77 longer than the lengths L3 and L4 of the second Oldham keys 61,62, the area of the first pressure-receiving surface 76a, 77a can be made larger than the area of the second pressure-receiving surfaces 61a, 62a without making the size of the Oldham ring 75 larger in the Y direction, and the surface pressure received by the first pressure-receiving surfaces 76a, 77a due to the load can be reduced.
  • W5 indicates the width of the first Oldham key 81 in the X direction (hereinafter referred to as "width W5"), and W6 indicates the length of the first Oldham key 82 in the X direction (hereinafter referred to as "width W6").
  • width W5 indicates the width of the first Oldham key 81 in the X direction
  • W6 indicates the length of the first Oldham key 82 in the X direction (hereinafter referred to as "width W6").
  • width W6 indicates the width of the first Oldham key 82 in the X direction
  • the Oldham ring 80 is configured in the same manner as the Oldham ring 27 of the second embodiment except that it has the first Oldham keys 81 and 82 in place of the first Oldham keys 76 and 77 constituting the Oldham ring 75.
  • the first Oldham key 81 is configured in the same manner as the first Oldham key 76 except that it has a width W5 wider than the width W1 of the first Oldham key 76.
  • the first Oldham key 81 is arranged in the circumferential direction of the Oldham ring main body 55 and has a first pressure-receiving surface 81a having a larger area than the second pressure-receiving surfaces 61a and 62a.
  • the first Oldham key 82 is configured in the same manner as the first Oldham key 77 except that it has a width W6 wider than the width W2 of the first Oldham key 77.
  • the first Oldham key 82 is arranged in the circumferential direction of the Oldham ring main body 55 and has a first pressure-receiving surface 82a having a larger area than the second pressure-receiving surfaces 61a and 62a.
  • the Oldham ring 80 of the third embodiment by making the widths W5 and W6 of the first Oldham keys 81 and 82 wider than the widths W3 and W4 of the second Oldham keys 61 and 62 without making the lengths L5 and L6 of the first Oldham keys 76, 77 longer than the lengths L3 and L4 of the second Oldham keys 61,62, the area of the first pressure-receiving surface 81a, 82a can be made larger than the area of the second pressure-receiving surfaces 61a, 62a without making the size of the Oldham ring 80 larger in the Y direction, and the surface pressure received by the first pressure-receiving surfaces 81a, 82a due to the load can be reduced.
  • the Oldham Ring 85 of the fourth embodiment will be described with reference to FIGS. 14 and 15 .
  • H7 indicates the height of the first Oldham key 86 in the axis O2 direction (hereinafter, referred to as "height H7")
  • H8 indicates the height of the first Oldham key 87 in the axis O2 direction (hereinafter, "height H8").
  • the same components as those of the structures shown in FIGS. 4 and 14 are designated by the same reference numerals.
  • the first Oldham key 86 is configured in the same manner as the first Oldham key 57 except that the length L7 in the Y direction has the same size as the width G1 of the straight linear portion 64 so as not to protrude to the outside of the outer surface 64d of the straight linear portion 64, and the height H7 is higher than the height H1 of the first Oldham key 57 and the heights H3 and H4 of the second Oldham keys 61, 62.
  • the first Oldham key 86 has a first pressure-receiving surface 86a arranged in the circumferential direction of the Oldham ring main body 55.
  • the first Oldham key 87 has a first pressure-receiving surface 87a arranged in the circumferential direction of the Oldham ring main body 55.
  • first and second connecting portions 67 and 68 have an arc shape
  • the shapes of the first and second connecting portions 67 and 68 may have a shape other than the arc shape.
  • the shapes of the first and second connecting portions 67 and 68 may be formed by one straight linear portion, or a plurality of straight linear portions extending in the directions intersecting each other may be connected to each other.
  • the present invention is applicable to Oldham rings and scroll compressors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP19792850.0A 2018-04-25 2019-03-27 Oldham-ring und spiralverdichter Pending EP3786452A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018084536A JP7016285B2 (ja) 2018-04-25 2018-04-25 スクロール圧縮機
PCT/JP2019/013204 WO2019208075A1 (ja) 2018-04-25 2019-03-27 オルダムリング、及びスクロール圧縮機

Publications (2)

Publication Number Publication Date
EP3786452A1 true EP3786452A1 (de) 2021-03-03
EP3786452A4 EP3786452A4 (de) 2021-03-03

Family

ID=68295123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19792850.0A Pending EP3786452A4 (de) 2018-04-25 2019-03-27 Oldham-ring und spiralverdichter

Country Status (5)

Country Link
EP (1) EP3786452A4 (de)
JP (1) JP7016285B2 (de)
CN (1) CN112292531B (de)
AU (1) AU2019258375B2 (de)
WO (1) WO2019208075A1 (de)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655696A (en) * 1985-11-14 1987-04-07 American Standard Inc. Anti-rotation coupling for a scroll machine
JPH0689749B2 (ja) * 1986-09-30 1994-11-14 三井精機工業株式会社 スクロ−ル圧縮機のオルダム継手構造
JPH0610081Y2 (ja) * 1987-12-29 1994-03-16 ダイキン工業株式会社 スクロール形流体機械
JPH04219401A (ja) * 1991-04-15 1992-08-10 Hitachi Ltd スクロール流体機械
US5403172A (en) * 1993-11-03 1995-04-04 Copeland Corporation Scroll machine sound attenuation
JP3584533B2 (ja) * 1995-04-12 2004-11-04 株式会社日立製作所 スクロール圧縮機
JPH08319958A (ja) * 1995-05-24 1996-12-03 Sanden Corp スクロール型流体装置
JP2804928B2 (ja) 1997-04-25 1998-09-30 株式会社日立製作所 スクロール流体機械
CN201050479Y (zh) * 2007-03-27 2008-04-23 珠海格力电器股份有限公司 涡旋压缩机的防自转机构
JP4879311B2 (ja) * 2009-11-16 2012-02-22 三菱電機株式会社 スクロール圧縮機
KR101216466B1 (ko) * 2011-10-05 2012-12-31 엘지전자 주식회사 올담링을 갖는 스크롤 압축기
CN203516101U (zh) * 2013-09-30 2014-04-02 柳州易舟汽车空调有限公司 涡旋压缩机
JP6769263B2 (ja) 2016-11-25 2020-10-14 日産自動車株式会社 路面判断方法および路面判断装置

Also Published As

Publication number Publication date
CN112292531B (zh) 2023-04-07
AU2019258375B2 (en) 2022-03-03
EP3786452A4 (de) 2021-03-03
JP2019190383A (ja) 2019-10-31
AU2019258375A1 (en) 2020-12-10
CN112292531A (zh) 2021-01-29
JP7016285B2 (ja) 2022-02-04
WO2019208075A1 (ja) 2019-10-31

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