US20020110471A1 - Oil supply cross-hole in orbiting scroll member - Google Patents
Oil supply cross-hole in orbiting scroll member Download PDFInfo
- Publication number
- US20020110471A1 US20020110471A1 US09/782,123 US78212301A US2002110471A1 US 20020110471 A1 US20020110471 A1 US 20020110471A1 US 78212301 A US78212301 A US 78212301A US 2002110471 A1 US2002110471 A1 US 2002110471A1
- Authority
- US
- United States
- Prior art keywords
- scroll member
- scroll
- hole
- base
- crankcase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
Definitions
- This invention relates to a unique position for an oil supply cross-hole in the orbiting scroll of a scroll compressor.
- first and second scroll members each have a base and a generally spiral wrap extending from a base. The wraps interfit to define compression chambers.
- One of the scroll members is caused to orbit relative to the other, and as the scroll member orbits the compression chambers decrease in volume to compress an entrapped refrigerant.
- crankcase is secured to the non-orbiting scroll through a plurality of structures called crankcase towers.
- a cross-hole extends through the base of the orbiting scroll to supply lubricant to the outer periphery of the orbiting scroll at a circumferential location generally aligned with one of the crankcase towers. Lubricant is supplied through this cross-hole to the seals and to the coupling.
- the cross-hole was formed at a location slightly upstream of the suction inlet into the scroll compressor. With such a location, there is the potential of lubricant being entrained into the refrigerant being compressed. This is undesirable.
- a cross-hole extends from the inner periphery of the bore of the orbiting scroll radially outwardly to the outer peripheral surface of the orbiting scroll to supply lubricant against a crankcase tower.
- this cross-hole is circumferentially downstream from the beginning of the orbiting scroll wrap, and less than 180° downstream from the beginning of the orbiting scroll wrap. More preferably, the cross-hole is between 30° and 90° downstream of the beginning of the scroll wrap. In an illustrated embodiment the cross-hole is a few degrees above 80 downstream of the beginning of the scroll wrap.
- the cross-hole is directed at a crankcase tower, which is desirable for providing adequate lubrication. Further, the position is far enough downstream that lubricant will not likely be drawn into the compression chambers in any undue quantities.
- FIG. 1 is a cross-sectional view of a scroll compressor according to this invention.
- FIG. 2 is a plan view of an orbiting scroll assembly incorporating the present invention.
- FIG. 3 shows the prior art.
- a scroll compressor 20 is illustrated in FIG. 1 having a housing shell 22 enclosing a quantity of oil 24 .
- a shaft 26 is driven to rotate by an electric motor 28 within the housing 22 .
- Lubricant is drawn from sump 24 upwardly through a lubricant supply passage 30 .
- An orbiting scroll member 32 has a downwardly extending boss 34 surrounding eccentric pin 35 from the shaft. Lubricant is supplied through the port 30 upwardly into the area of the boss 34 .
- This lubricant extends through the base 38 of the orbiting scroll 32 and through a cross-hole 40 to a cross-hole outlet 39 positioned circumferentially aligned with a crankcase tower 42 .
- the orbiting scroll 32 has a generally spiral wrap 36 .
- the orbiting scroll faces and is meshed with a non-orbiting scroll 44 having its own wrap 46 .
- the two wraps of the two scroll members 36 and 44 compress the entrapped refrigerant and deliver it to a discharge opening 48 .
- An Oldham coupling 49 constrains the orbiting scroll 32 for orbital movement relative to the non-orbiting scroll 44 .
- a back pressure tap 17 taps a refrigerant to a back pressure chamber defined between seals 18 and 19 .
- the purpose of the cross-hole 40 is to deliver lubricant against the inner periphery of the crankcase tower 40 such that there will be sufficient lubricant for the seal 19 and the coupling 49 .
- the cross-hole 40 is positioned by an angle A from a beginning point 56 of the orbiting scroll wrap 36 .
- the outlet 39 faces a crankcase tower 42 .
- the suction inlet 50 into the scroll compressor is at a position slightly upstream of the beginning point 56 of the scroll wrap.
- the direction of orbital movement of the scroll wrap is counter-clockwise in the view shown in FIG. 2.
- Other crankcase towers 52 and 54 are shown circumferentially spaced around the orbiting scroll member 32 .
- the angle A is preferably chosen to be greater than 0 but less than 180°. In this way, the outlet 39 is positioned such that it is unlikely lubricant will be mixed into the suction flow 50 . Further, the outlet 39 is preferably circumferentially aligned with a crankcase tower 42 . With orbital movement of the orbiting scroll, the relative location of the outlet 39 and the tower will change, however, throughout the orbital movement, it is likely that the outlet 39 will preferably be aligned with a portion of the crankcase tower 42 . In this way, the tower 42 can provide a deflection surface for deflecting the oil back inwardly toward the seal and coupling. More preferably, it is preferred that the angle A be between 30° and 90°. The preferred angle is slightly over 80° as is illustrated in FIG. 2.
- FIG. 3 shows the prior art wherein a cross-hole 50 was positioned further upstream from the position illustrated in FIG. 2.
- the outlet 102 was aligned with the crankcase tower 54 . In this position there was the possibility of lubricant mixing into the suction flow 50 , which is undesirable.
Abstract
A scroll compressor includes an oil supply cross-hole extending radially outwardly to the outer peripheral surface of the base of the orbiting scroll. The cross-hole supplies lubricant against the crankcase towers such that lubricant is supplied to both the Oldham coupling and the seals for the back pressure chamber. The cross-hole is preferably positioned to be between 80° and 90° downstream from the beginning of the orbiting scroll wrap. In this position, adequate oil will be supplied to lubricate the Oldham coupling and the seal, while at the same time, it is unlikely that an undue amount of lubricant will be allowed into the scroll compressor chambers.
Description
- This invention relates to a unique position for an oil supply cross-hole in the orbiting scroll of a scroll compressor.
- Scroll compressors are becoming widely utilized in refrigerant applications. In a scroll compressor first and second scroll members each have a base and a generally spiral wrap extending from a base. The wraps interfit to define compression chambers. One of the scroll members is caused to orbit relative to the other, and as the scroll member orbits the compression chambers decrease in volume to compress an entrapped refrigerant.
- One challenge with scroll compressors involves holding the two scroll members together as the refrigerant begins to be compressed. The opposed wraps must contact the base of the opposed scroll member to define the compression chambers. However, the entrapped refrigerant creates a separating force tending to bias the two scroll members away from each other. Thus, it is typical in scroll compressors to tap a portion of the refrigerant to a back pressure chamber. The back pressure chambers are typically defined by seals within a crankcase which supports the orbiting scroll. Further, outwardly of the seals an Oldham coupling constrains the orbiting scroll to orbiting movement, even though it receives a rotary input from a rotary motor.
- One challenge in the prior art is supplying adequate lubricant to the interface between the orbiting scroll and the crankcase to provide sufficient lubrication to both the coupling and the seals.
- The crankcase is secured to the non-orbiting scroll through a plurality of structures called crankcase towers. In the prior art, a cross-hole extends through the base of the orbiting scroll to supply lubricant to the outer periphery of the orbiting scroll at a circumferential location generally aligned with one of the crankcase towers. Lubricant is supplied through this cross-hole to the seals and to the coupling.
- In the prior art, the cross-hole was formed at a location slightly upstream of the suction inlet into the scroll compressor. With such a location, there is the potential of lubricant being entrained into the refrigerant being compressed. This is undesirable.
- In the disclosed embodiment of this invention, a cross-hole extends from the inner periphery of the bore of the orbiting scroll radially outwardly to the outer peripheral surface of the orbiting scroll to supply lubricant against a crankcase tower. Preferably this cross-hole is circumferentially downstream from the beginning of the orbiting scroll wrap, and less than 180° downstream from the beginning of the orbiting scroll wrap. More preferably, the cross-hole is between 30° and 90° downstream of the beginning of the scroll wrap. In an illustrated embodiment the cross-hole is a few degrees above 80 downstream of the beginning of the scroll wrap.
- In this location, the cross-hole is directed at a crankcase tower, which is desirable for providing adequate lubrication. Further, the position is far enough downstream that lubricant will not likely be drawn into the compression chambers in any undue quantities.
- These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
- FIG. 1 is a cross-sectional view of a scroll compressor according to this invention.
- FIG. 2 is a plan view of an orbiting scroll assembly incorporating the present invention.
- FIG. 3 shows the prior art.
- A
scroll compressor 20 is illustrated in FIG. 1 having a housing shell 22 enclosing a quantity ofoil 24. Ashaft 26 is driven to rotate by anelectric motor 28 within the housing 22. Lubricant is drawn fromsump 24 upwardly through alubricant supply passage 30. An orbitingscroll member 32 has a downwardly extendingboss 34 surroundingeccentric pin 35 from the shaft. Lubricant is supplied through theport 30 upwardly into the area of theboss 34. This lubricant extends through thebase 38 of theorbiting scroll 32 and through across-hole 40 to across-hole outlet 39 positioned circumferentially aligned with acrankcase tower 42. As shown, theorbiting scroll 32 has a generallyspiral wrap 36. The orbiting scroll faces and is meshed with anon-orbiting scroll 44 having itsown wrap 46. The two wraps of the twoscroll members discharge opening 48. An Oldhamcoupling 49 constrains theorbiting scroll 32 for orbital movement relative to thenon-orbiting scroll 44. As shown, a back pressure tap 17 taps a refrigerant to a back pressure chamber defined betweenseals - As is known, the purpose of the
cross-hole 40 is to deliver lubricant against the inner periphery of thecrankcase tower 40 such that there will be sufficient lubricant for theseal 19 and thecoupling 49. - As shown in FIG. 2, most preferably, the
cross-hole 40 is positioned by an angle A from abeginning point 56 of the orbitingscroll wrap 36. As shown theoutlet 39 faces acrankcase tower 42. Further, as shown, the suction inlet 50 into the scroll compressor is at a position slightly upstream of thebeginning point 56 of the scroll wrap. The direction of orbital movement of the scroll wrap is counter-clockwise in the view shown in FIG. 2.Other crankcase towers scroll member 32. - The angle A is preferably chosen to be greater than 0 but less than 180°. In this way, the
outlet 39 is positioned such that it is unlikely lubricant will be mixed into thesuction flow 50. Further, theoutlet 39 is preferably circumferentially aligned with acrankcase tower 42. With orbital movement of the orbiting scroll, the relative location of theoutlet 39 and the tower will change, however, throughout the orbital movement, it is likely that theoutlet 39 will preferably be aligned with a portion of thecrankcase tower 42. In this way, thetower 42 can provide a deflection surface for deflecting the oil back inwardly toward the seal and coupling. More preferably, it is preferred that the angle A be between 30° and 90°. The preferred angle is slightly over 80° as is illustrated in FIG. 2. - FIG. 3 shows the prior art wherein a
cross-hole 50 was positioned further upstream from the position illustrated in FIG. 2. Theoutlet 102 was aligned with thecrankcase tower 54. In this position there was the possibility of lubricant mixing into thesuction flow 50, which is undesirable. - Although a preferred embodiment of this invention has been disclosed, a worker in this art would recognize that modifications would come within the scope of this invention. For that reason the following claims should be studied to determine the true scope and content of this invention.
Claims (7)
1. A scroll compressor comprising:
a first scroll member having a base and a generally spiral wrap extending from said base;
a second scroll member having a base and a generally spiral wrap extending from its base;
a crankcase for supporting said second scroll member, said second scroll member being driven to orbit relative to said first scroll member;
a driveshaft being driven by a motor for causing said second scroll member to orbit, and a coupling positioned to constrain said second scroll member to orbit; and
oil supply port passing through said drive shaft, and a oil cross-hole extending through said base of said second scroll member to an outer peripheral surface of said second scroll member, said oil support cross-hole being at a location between 0 and 180° measured from a beginning point of said wrap of said second scroll member measured in a downstream direction.
2. A scroll compressor as recited in claim 1 , wherein said crankcase includes a number of crankcase towers extending upwardly and along an outer peripheral surface of said second scroll member, and said cross-hole being circumferentially aligned with one of said crankcase towers.
3. A scroll compressor as recited in claim 1 , wherein said cross-hole is positioned from said beginning point of said scroll wrap by an angle between 30° and 90° in a downstream direction.
4. A scroll compressor as recited in claim 3 , wherein said angle is between 80° and 90°.
5. A scroll compressor as recited in claim 1 , wherein a pair of spaced seals are positioned in said crankcase for defining a back pressure chamber, said oil supply ports supplying oil to said seals.
6. A scroll compressor as recited in claim 5 , wherein said oil supply port further supplying oil to said coupling.
7. A scroll compressor comprising:
a first scroll member having a base and a generally spiral wrap extending from said base;
a second scroll member having a base and a generally spiral wrap extending from its base;
a crankcase for supporting said second scroll member, said second scroll member being driven to orbit relative to said first scroll member, said crankcase including a number of crankcase towers extending upwardly and along an outer peripheral surface of said second scroll member;
a drive shaft being driven by a motor for causing said scroll member to orbit, and a coupling positioned to constrain said second scroll member to orbit; and
an oil supply port passing through said drive shaft, and a oil cross-hole extending through said base of said second scroll member to an outer peripheral surface of said second scroll member, said oil support cross-hole being at a location between 30° and 90° measured from a beginning point of said wrap of said second scroll member measured in a downstream direction, said cross-hole also being circumferentially aligned with one of said crankcase towers.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/782,123 US6422843B1 (en) | 2001-02-13 | 2001-02-13 | Oil supply cross-hole in orbiting scroll member |
MYPI20020306A MY131992A (en) | 2001-02-13 | 2002-01-28 | Oil supply cross-hole in orbiting scroll member |
KR10-2002-0005265A KR100441735B1 (en) | 2001-02-13 | 2002-01-30 | Scroll compressor |
CNB021030928A CN1230623C (en) | 2001-02-13 | 2002-02-11 | Horizontal oiling hole of spiral member in spiral motion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/782,123 US6422843B1 (en) | 2001-02-13 | 2001-02-13 | Oil supply cross-hole in orbiting scroll member |
Publications (2)
Publication Number | Publication Date |
---|---|
US6422843B1 US6422843B1 (en) | 2002-07-23 |
US20020110471A1 true US20020110471A1 (en) | 2002-08-15 |
Family
ID=25125039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/782,123 Expired - Lifetime US6422843B1 (en) | 2001-02-13 | 2001-02-13 | Oil supply cross-hole in orbiting scroll member |
Country Status (4)
Country | Link |
---|---|
US (1) | US6422843B1 (en) |
KR (1) | KR100441735B1 (en) |
CN (1) | CN1230623C (en) |
MY (1) | MY131992A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060073056A1 (en) * | 2004-10-06 | 2006-04-06 | Lg Electronics Inc. | Hermetically sealed type orbiting vane compressor |
US20060073052A1 (en) * | 2004-10-06 | 2006-04-06 | Lg Electronics Inc. | Orbiting vane compressor incorporating orbiting vane with oil supply function |
US20110064596A1 (en) * | 2009-09-11 | 2011-03-17 | Hitachi Appliances, Inc. | Scroll compressor |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6149413A (en) * | 1998-07-13 | 2000-11-21 | Carrier Corporation | Scroll compressor with lubrication of seals in back pressure chamber |
US6884046B2 (en) * | 2002-03-04 | 2005-04-26 | Daiken Industries, Ltd. | Scroll compressor |
EP2113053B1 (en) * | 2007-01-15 | 2015-08-19 | LG Electronics Inc. | Compressor and oil separating device therefor |
WO2008088112A1 (en) * | 2007-01-19 | 2008-07-24 | Lg Electronics Inc. | Compressor and oil blocking device therefor |
KR100869929B1 (en) | 2007-02-23 | 2008-11-24 | 엘지전자 주식회사 | Scroll compressor |
KR100867623B1 (en) * | 2007-03-21 | 2008-11-10 | 엘지전자 주식회사 | Device for reducing vibration in compressor |
KR100882481B1 (en) * | 2007-04-25 | 2009-02-06 | 엘지전자 주식회사 | Structure for feeding oil in scroll compressor |
US20110091341A1 (en) * | 2009-10-21 | 2011-04-21 | Carlos Zamudio | Method and apparatus for establishing clearances in scroll compressor |
JP5701230B2 (en) * | 2012-02-14 | 2015-04-15 | 日立アプライアンス株式会社 | Scroll compressor |
WO2014206334A1 (en) | 2013-06-27 | 2014-12-31 | Emerson Climate Technologies, Inc. | Scroll compressor with oil management system |
KR102008939B1 (en) * | 2014-07-07 | 2019-08-08 | 한온시스템 주식회사 | Scroll compressor with a seal for a back pressure chamber |
KR102008940B1 (en) * | 2014-08-29 | 2019-08-08 | 한온시스템 주식회사 | Scroll compressor |
KR101971819B1 (en) | 2015-04-30 | 2019-04-23 | 에머슨 클라이미트 테크놀로지스 (쑤저우) 코., 엘티디. | Scroll compressor |
US10414241B2 (en) | 2016-06-30 | 2019-09-17 | Emerson Climate Technologies, Inc. | Systems and methods for capacity modulation through eutectic plates |
US10569620B2 (en) | 2016-06-30 | 2020-02-25 | Emerson Climate Technologies, Inc. | Startup control systems and methods to reduce flooded startup conditions |
US11236648B2 (en) | 2018-11-20 | 2022-02-01 | Emerson Climate Technologies, Inc. | Climate-control system having oil cooling control system |
US11566624B2 (en) | 2020-10-21 | 2023-01-31 | Emerson Climate Technologies, Inc. | Compressor having lubrication system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55160192A (en) * | 1979-05-28 | 1980-12-12 | Hitachi Ltd | Sealed scroll fluid equipment |
JPS61192881A (en) * | 1985-02-20 | 1986-08-27 | Matsushita Refrig Co | Scroll type compressor |
JPS62113880A (en) * | 1985-11-13 | 1987-05-25 | Hitachi Ltd | Scroll fluid machine |
JPH01277694A (en) * | 1988-04-28 | 1989-11-08 | Toshiba Corp | Horizontal scroll type hydraulic machine |
JP2928632B2 (en) * | 1990-11-30 | 1999-08-03 | 株式会社日立製作所 | Horizontal refrigerant compressor |
KR920007621B1 (en) * | 1990-12-29 | 1992-09-09 | 주식회사 금성사 | Lubricating device for scroll compressor |
US5989000A (en) * | 1997-08-07 | 1999-11-23 | Scroll Technologies | Scroll compressor with back pressure hole relief |
US6149413A (en) | 1998-07-13 | 2000-11-21 | Carrier Corporation | Scroll compressor with lubrication of seals in back pressure chamber |
-
2001
- 2001-02-13 US US09/782,123 patent/US6422843B1/en not_active Expired - Lifetime
-
2002
- 2002-01-28 MY MYPI20020306A patent/MY131992A/en unknown
- 2002-01-30 KR KR10-2002-0005265A patent/KR100441735B1/en not_active IP Right Cessation
- 2002-02-11 CN CNB021030928A patent/CN1230623C/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060073056A1 (en) * | 2004-10-06 | 2006-04-06 | Lg Electronics Inc. | Hermetically sealed type orbiting vane compressor |
US20060073052A1 (en) * | 2004-10-06 | 2006-04-06 | Lg Electronics Inc. | Orbiting vane compressor incorporating orbiting vane with oil supply function |
US7300266B2 (en) * | 2004-10-06 | 2007-11-27 | Lg Electronics Inc. | Orbiting vane compressor incorporating orbiting vane with oil supply function |
US20110064596A1 (en) * | 2009-09-11 | 2011-03-17 | Hitachi Appliances, Inc. | Scroll compressor |
US8888475B2 (en) * | 2009-09-11 | 2014-11-18 | Hitachi Appliances, Inc. | Scroll compressor with oil supply across a sealing part |
Also Published As
Publication number | Publication date |
---|---|
US6422843B1 (en) | 2002-07-23 |
KR100441735B1 (en) | 2004-07-27 |
KR20020066967A (en) | 2002-08-21 |
CN1370928A (en) | 2002-09-25 |
CN1230623C (en) | 2005-12-07 |
MY131992A (en) | 2007-09-28 |
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