EP1811179A2 - Spiralfluidmaschine - Google Patents

Spiralfluidmaschine Download PDF

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Publication number
EP1811179A2
EP1811179A2 EP07001457A EP07001457A EP1811179A2 EP 1811179 A2 EP1811179 A2 EP 1811179A2 EP 07001457 A EP07001457 A EP 07001457A EP 07001457 A EP07001457 A EP 07001457A EP 1811179 A2 EP1811179 A2 EP 1811179A2
Authority
EP
European Patent Office
Prior art keywords
pivot
disc
partition wall
hole
scroll
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.)
Withdrawn
Application number
EP07001457A
Other languages
English (en)
French (fr)
Other versions
EP1811179A3 (de
Inventor
Kazuaki 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
Publication of EP1811179A2 publication Critical patent/EP1811179A2/de
Publication of EP1811179A3 publication Critical patent/EP1811179A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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

Definitions

  • the present invention relates to a scroll fluid machine such as a compressor or a vacuum pump for compressing fluid such as air or refrigerant and especially to a scroll fluid machine in which bearings of an orbiting scroll drive part is lubricated by lubricating oil and sealing structure is provided.
  • JP11-336676A discloses a scroll fluid machine in which bearing of driving part of an orbiting scroll are lubricated by taking up lubricating oil stored in a housing.
  • Such a scroll fluid machine achieves higher lubricating capability than a scroll fluid machine in which bearings of driving part is lubricated by grease to extend life of the bearing.
  • lubricating oil is likely to go into a sealed chamber between an orbiting scroll and a fixed scroll. It is required to seal the parts from lubricating oil.
  • a partition wall is provided between a driving part where lubricating oil is stored and an orbiting end plate in a housing.
  • a metal thrust plate which slidably contacts the other during revolving is merely provided, but no special sealing member is provided.
  • the driving part (b) and the orbiting scroll (a) are divided by a partition wall (f) to allow the orbiting scroll (a) to revolve.
  • An annular sealing member (g) having a rectangular cross-section and called wiper seal is provided between the partition wall (f) and the orbiting scroll (a) above an oil level of the storage portion (d) to surround a plurality of self-rotation-preventing devices of the orbiting scroll (a).
  • the sealing member (g) slidably contacts the inner side surface of the support plate (i) of the orbiting scroll (a) to prevent the lubricating oil (c) taken up by the counter weight (k) of the driving shaft (j) from going into the orbiting scroll (a).
  • a scroll fluid machine comprising:
  • a rear plate 3 of a fixed scroll 2 is fixed with a bolt 4 and a nut 5.
  • the fixed scroll 2 comprises a circular fixed end plate 8 which has an inlet 6 at the outer circumference and an outlet 7 at the center.
  • a spiral fixed wrap 9 is mounted on the rear surface of the fixed end plate 8, and a plurality of cooling fins 10 are horizontally mounted on the front surface thereof.
  • An-orbiting wrap 13 which engages with the fixed wrap 9 is mounted on a circular orbiting end plate 12 of an orbiting scroll 11 disposed behind the fixed scroll 2 and a plurality of cooling fins 14 are horizontally mounted on the rear surface thereof.
  • the front surface of the outer circumference of the orbiting end plate 12 contacts the rear surface of the rear plate 3 of the fixed scroll 2.
  • a circular support plate 15 is fixed with a plurality of countersunk screws 16 to put the cooling fins 14 therebetween.
  • a pivot 17 projects rearwards.
  • the housing 1 is divided into the orbiting scroll 11 and a rear driving part 19 by a partition wall 20 close to the support plate 15.
  • the pivot 17 and the self rotation-preventing pivots 18 pass through the partition wall 20 to project in the driving part 19.
  • a driving shaft 21 driven by a motor (not shown) is rotatably mounted via a pair of ball bearings 22,22.
  • the driving shaft 21 has an eccentric axial portion 24 which has an eccentric hole which opens at the front end.
  • the center O2 of the eccentric hole 23 is disposed away from the center O1 of the driving shaft O1.
  • a counter weight 25 projects from the outer circumferential surface of the eccentric axial portion 24 in a direction opposite to the eccentric hole 23.
  • the counter weight 25 also acts as a taking-up bar for a lubricating oil 27 stored in a storage 26 at the bottom of the housing 1 to allow the lubricating oil 27 to be taken up every one rotation of the driving shaft 21.
  • the pivot 17 of the orbiting scroll 11 concentric therewith is rotatably engaged via a ball bearing 28.
  • the center O2 of the pivot 17 deviates from the center O1 of the drving shaft 21.
  • a self-rotation-preventing device 29 prevents the orbiting scroll 21 from rotating on its own axis, and comprises a support shaft 32 pivotally supported in a recess 30 of a rear wall 1a of the housing 1 in parallel with the driving shaft 21, an eccentric axial portion 33 at the front end of the support shaft 32; and the pivot 18 supported in an eccentric hole 33a of the eccentric axial portion 33 via two ball bearings 34,34.
  • Rotation of the driving shaft 21 allows the orbiting scroll 11 to eccentrically revolve by the pivot 17 in the eccentric hole 23 and the self-rotation-preventing devices 29 thereby gradually reducing a volume of a sealed chamber 35 between the fixed wrap 9 and the orbiting wrap 13 towards the center to compress a fluid from the inlet 6 to the outlet 7 from which the fluid is discharged.
  • the pivot 17 goes through a hole 36 coaxially with the driving shaft 21.
  • a disc 37 rotatably fits to have the same thickness as that of the partition wall.
  • the pivot 17 rotatably fits in the eccentric hole 38 having an internal diameter equal to an external diameter of the pivot 17.
  • Snap rings 39,39 around the pivot 17 limit axial movement of the disc 37 to prevent the disc 37 from coming off the hole 36.
  • annular stepped portions 40,40 are formed and engages with oil-resistant sealing members 41,41 such as rubber having a rectangular cross-section in the disc 37 and the pivot 17 respectively in a liquid-tight manner.
  • the hole 36 and the disc 37 are concentric with the driving shaft 21 and the pivot 17 rotatably goes through the eccentric hole 38.
  • rotation of the driving shaft 21 enables the pivot 17 to rotate around the center O1 without problem thereby causing the disc 37 to rotate around the center O1 in the hole 36.
  • the inner circumferential surfaces of the sealing members 41 slidably contact the outer circumferential surfaces of the disc 37 and the pivot 17 thereby keeping sealing capability to the hole 36 and the eccentric hole 38.
  • Similar sealing structure is provided on the peripheral end of the partition wall 20 through which the self-rotation preventing pivot 18 passes.
  • Each member of the sealing structure of the self-rotation preventing pivot 18 is smaller because the diameter of the self-rotation preventing pivot 18 is smaller than that of the pivot 17, but the sealing structure is almost the same as the sealing structure of the pivot 17. Thus, the same numerals are allotted and its description will be omitted.
  • the hole 36 through which the pivot 17 and the self rotation-preventing pivot 18 with a play is concentric with the driving shaft 21 and the support shaft 32.
  • the inner circumferential surface of the sealing member 41 slidably contacts the outer circumferential surface of the disc 37 in the hole 36 and the outer circumferential surfaces of the pivot 17 and the self-rotation-preventing shaft 18 which rotatably fit in the eccentric hole 38 of the disc 37 to keep sealing capability.
  • the lubricating oil 27 taken up by the counter weight 25 to lubricate the bearings 22,28,31,34 in the driving part 19 does not go into the orbiting scroll 11 in front of the partition wall 20.
  • the present invention is not limited to the foregoing embodiment.
  • the outer larger-diameter sealing member 41 engages on the stepped annular groove 40 of the partition wall 20.
  • a stepped annular groove may be provided on the outer circumference of the disc 37 and a sealing member 41 may engage on the stepped annular groove to allow the outer circumferential surface to slidably contact the inner surface of the hole 36 of the partition wall 20.
  • a sealing member 41 is disposed in the middle of the disc 37.
  • An annular groove 42 having a rectangular cross-section is formed in the middle of a hole 36 and a disc 37 of a partition wall 20 and a sealing member 41 engages in the groove 42.
  • annular groove 43 having a rectangular cross-section is formed on the outer circumferential surface of a disc 37 and a pivot 17, and a sealing member 41 engages in the groove 43.
  • the sealing member 31 may comprise an O-ring having a circular or elliptical cross-section.
  • the pivot 17 and self-rotation-preventing pivot 18 comprise relatively-small-diameter solid shafts which fit in the eccentric holes 23,33a of the eccentric axial portions 24,33.
  • the present invention may apply to a scroll fluid machine in which the pivot 17 and self-rotation-preventing pivot 18 comprise larger-diameter tubular ones.
  • a larger hole is formed in the partition wall 20 and a larger disc which has an eccentric hole in which a tubular pivot fits engages in the hole.
  • a sealing member may be applied to the hole.
  • the present invention is applied a scroll fluid machine in which the lubricating oil 27 stored in the storage portion 26 is taken up by the counter weight 25 or a taking-up bar to allow bearings of the orbiting scroll 11 and self-rotation-preventing device 29 to be lubricated, but may be applied to a scroll fluid machine in which bearing of driving part is lubricated with lubricating oil fed with an oil pump.
EP07001457A 2006-01-24 2007-01-24 Spiralfluidmaschine Withdrawn EP1811179A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006015565A JP2007198188A (ja) 2006-01-24 2006-01-24 スクロール式流体機械

Publications (2)

Publication Number Publication Date
EP1811179A2 true EP1811179A2 (de) 2007-07-25
EP1811179A3 EP1811179A3 (de) 2009-07-22

Family

ID=38008366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07001457A Withdrawn EP1811179A3 (de) 2006-01-24 2007-01-24 Spiralfluidmaschine

Country Status (2)

Country Link
EP (1) EP1811179A3 (de)
JP (1) JP2007198188A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146485A (ja) * 1984-08-11 1986-03-06 Toyoda Autom Loom Works Ltd スクロ−ル型圧縮機における立上りシヨツク緩和機構
JPH11336676A (ja) * 1998-03-25 1999-12-07 Tokico Ltd スクロール式流体機械

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146485A (ja) * 1984-08-11 1986-03-06 Toyoda Autom Loom Works Ltd スクロ−ル型圧縮機における立上りシヨツク緩和機構
JPH11336676A (ja) * 1998-03-25 1999-12-07 Tokico Ltd スクロール式流体機械

Also Published As

Publication number Publication date
EP1811179A3 (de) 2009-07-22
JP2007198188A (ja) 2007-08-09

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