US3796522A - Compressor - Google Patents

Compressor Download PDF

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Publication number
US3796522A
US3796522A US00157390A US3796522DA US3796522A US 3796522 A US3796522 A US 3796522A US 00157390 A US00157390 A US 00157390A US 3796522D A US3796522D A US 3796522DA US 3796522 A US3796522 A US 3796522A
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United States
Prior art keywords
oil
suction port
compressor
pump
passage portion
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00157390A
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English (en)
Inventor
R Oshima
S Miyamoto
K Kawashima
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.)
Hitachi Ltd
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Hitachi Ltd
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Filing date
Publication date
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Publication of US3796522A publication Critical patent/US3796522A/en
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Expired - Lifetime 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/109—Lubrication
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type

Definitions

  • ABSTRACT A compressor for use in a compression type refrigeration cycle, in which the direction of a refrigerant flow passage is sharply changed at the refrigerant suction port, whereby lubricating oil mixedin the refrigerant in the refrigeration cycle is effectively separated and thereafter collected rapidly by making use of the dynamic pressure of said refrigerant and a pump.
  • This type of compressor unlike the ordinary rotary machines and equipments, is constructed such that the sliding portions communicate with a refrigerant passage.
  • hydrocarbon fluoride-type gases commonly used as a refrigerant have the property of being very easily soluble in lubricating oils. Therefore, it is usual that a certain amount of lubricating oil flows in the circuit along with the discharged refrigerant.
  • a high degree of vacuum is produced abruptly at the start or acceleration of the compressor, a lubricating oil bubbling phenomenon occurs due to sudden boiling of the refrigerant dissolved in the lubricating oil in the oil tank, with the result that a large quantity of lubricating oil is introduced into the refrigerant circuit through the gap between the cylinder blocks and the shell of the compressor.
  • US. Pat. No. 3,352,485 proposes to form oil channels in the outer surface of the cylinder block and separate and collect the oil, present in the refrigerant sucked from the suc tion port of the compressor, through said oil channels.
  • U.S. Pat. No. 2,835,436 proposed to provide an impeller at the suction port of the compressor and centrifugally separate and collect the oil having a relatively large specific gravity by said impeller.
  • Japanese Utility Model Publication No. 3416/67 proposes, as a method of preventing an oil shortage, to provide on the front stage of the oil tank a small oil chamber communicating with said oil tank by a small aperture and communicate said oil chamber with the gear pump, so that only a small amount of oil stored in said oil chamber may be sucked even when a high degree of vacuum is produced in the compressor and acts in the oil tank.
  • a primary object of the present invention is to provide a compressor comprising oil separating means provided at a refrigerant suction port thereof, by which the oil present in the refrigerant is separated and collected early.
  • Another object of the invention is to provide a compressor of the character described above in which an oil suction port of a gear pump is shaped in a unique configuration so that the oil separated by the oil separating means may be quickly colllected by said gear pump.
  • FIG. 1 is a side elevation view of an ordinary swash plate compressor
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1;
  • FIG. 3 is a diagrammatic view of a side cover being positioned adjacent a suction port of a swash plate compressor of an embodiment of the present invention
  • FIG. 4 shows a back surface of the side cover of FIG. 3;
  • FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 4;
  • FIG. 6 shows a relative position between a suction port and a discharge port of an ordinary gear pump which is used for supplying oil into the swash plate compressor
  • FIG. 7 shows a relative position between a suction port and a discharge port of a gear pump utilized in the present invention
  • FIG. 8 through 10 are explanative views of functions of said gear pump.
  • FIG. 1 l is a cross-sectional view of the compressor of the instant invention illustrating the suction port of the gear pump in communication with an oil pan.
  • An ordinary swash plate compressor 1 has two cylinder blocks 2, 2' each having three cylinders 3 therein.
  • a piston 4 which is in engagement at its mid portion with a swash plate 7 through a ball 5 and a slipper 6.
  • the swash plate 7 is fixedly mounted on a shaft 8 supported in the cylinder blocks 2, 2' through a radial bearing 9 and a thrust bearing 10.
  • the cylinder blocks 2, 2' are inserted in a shell 11 and side covers 13, 14 are fitted to the side faces of said cylinder blocks with a valve plate 12 interposed therebetween respectively.
  • a low pressure chamber 15 and a high pressure chamber 16 which are respectively communicated with the cylinder 3 through a valve portion.
  • the low pressure chamber 15 is also communicated with a suction passage 17.
  • the suction passage has a vertical passage portion 18 and a horizontal passage portion 19 connected at right angles to each other.
  • the vertical passage portion 18 is extended further from the intersection with the horizontal passage portion 19, .to form a separation chamber 20 which is communicated with the suction side of a gear pump 22 through a collecting passage 21 and a communication port (21').
  • An inner gear 23 of the gear pump 22 is fixedly mounted on the shaft 8 within a gear case 24.
  • a suction port consists of a main suction port and an auxiliary suction port 26, and the main suction port 25 communicates with an oil pan 27, while the auxiliary suction port 26 communicates with the collecting passage 21.
  • a discharge port 28 communi-,
  • the suction port and discharge port of the gear pump respectively have the shapes as shown in FIG. 6.
  • the shapes of the suction port 25 and the discharge port 28 are determined such that, with a a representing the points of contact between the inner gear 23 and an outer gear formed on the inner side of gear case 24'when the enclosed volume-is largest, and b b the points of contact at a portion where said volume is smallest, as shown, for example, in FIG.
  • the length of the suction port 25 will be from b to a and the width thereof is slightly larger than the width between the root circles of the inner gear 23 and the outer gear, and the length of the discharge port 28 will be from 12 to a and the width thereof is similar to that of the suction port 25.
  • the suction port 25 starts from b and is shorter than a the enclosed volume is in the process of increasing but, since the suction port 25 is short, no fluid is sucked and accordingly the pressure drops.
  • the suction port 25 is only up to a and the amount of fluid sucked from the suction port is represented by the hatched volume.
  • the pressure drops and discharge starts from the moment when the state of FIG. 8 is produced.
  • the auxiliary suction port 26 is provided which will contact the point a, in the state of the inner gear and the outer gear shown in FIG. 9, so as to suck the fluid therethrough, an amount of fluid equal to the balance of the hatched volumes shown in FIGS.
  • auxiliary suction port 26 must also be in contact with the suction port side of the hatched portion of FIG. 8, since the discharge commences at the moment when the state of FIG. 8 starts to change to the next state.
  • FIG. 10 shows the case in which the size of the auxiliary suction port 26 is varied. It will be seen that the amount of fluid sucked from the main suction port 25 is larger than in the case of FIG. 9. t Thus, it will be understood that the proportion of the amount of fluid sucked from the main suction port 25 to the amount sucked from the auxiliary-suction port 26 can be varied by suitably selecting the size of said auxiliary suction port 26. In other words, a constant amount of fluid is always sucked from the main and auxiliary suction ports.
  • the main suction port 25 communicates with the oil pan 27 via communication port 29 (FIG.
  • the vertical passage portion and the horizontal passage portion of the suction passage 17 are not necessarily at right angles but at any angle which is large enough to separate the oil.
  • the main suction port is open in the pump at a location where the pump is in the initial stage of its suction stroke and said auxiliary suction port at a location where the pump is in the latter stage thereof, the main and the auxiliary suction ports may be open in said pump at either location where the pump is in the initial and the latter stages of its suction stroke.
  • a compressor used in compression type refrigeration cycles having suction passage means, oil separating separating chamber having a bottom portion directly communicated with said suction port of said oil pump means for returning the oil from said separating chamber to said oil pump means.
  • a compressor according to claim 1 wherein an oil collecting means of a smaller diameter than said oil separating chamber is provided at the bottom of said chamber in communication with said oil pump means.
  • suction port of said oil pump means consists of a main suction port and an auxiliary suction port said oil separating chamber being in communication with said auxiliary suction port and said main suction port being in communication with an oil pan.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
US00157390A 1970-06-29 1971-06-28 Compressor Expired - Lifetime US3796522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45056040A JPS4915561B1 (enrdf_load_stackoverflow) 1970-06-29 1970-06-29

Publications (1)

Publication Number Publication Date
US3796522A true US3796522A (en) 1974-03-12

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US00157390A Expired - Lifetime US3796522A (en) 1970-06-29 1971-06-28 Compressor

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JP (1) JPS4915561B1 (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888604A (en) * 1972-09-29 1975-06-10 Hitachi Ltd Compressor for a refrigerating machine
FR2303969A1 (fr) * 1975-03-13 1976-10-08 Central Automotive Ind Compresseur pour un gaz refrigerant
US4551069A (en) * 1984-03-14 1985-11-05 Copeland Corporation Integral oil pressure sensor
US5363740A (en) * 1993-07-16 1994-11-15 Pneumo Abex Corporation Fluid motor/pump with scavenged case
US20060093507A1 (en) * 2004-10-28 2006-05-04 Takahiro Yamaguchi Rotary pump for braking device
US20060147318A1 (en) * 2002-08-17 2006-07-06 Oxford Magnet Technology Oil carry-over prevention from helium gas compressor
US20070134118A1 (en) * 2005-11-30 2007-06-14 Yoo Byoung K Oil pump for a compressor
US20070160488A1 (en) * 2005-11-28 2007-07-12 Yoo Byung K Scroll compressor
US20070160489A1 (en) * 2005-11-28 2007-07-12 Yoo Byoung K Oil pump for a compressor
US20090031753A1 (en) * 2007-07-30 2009-02-05 Byung-Kil Yoo Compressor
US20090035160A1 (en) * 2007-07-30 2009-02-05 Byung-Kil Yoo Hermetic compressor and refrigeration cycle device having the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52134147U (enrdf_load_stackoverflow) * 1976-04-07 1977-10-12

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1029309A (en) * 1909-12-20 1912-06-11 Stephen S Miles Air and gas compressor.
US1486835A (en) * 1922-10-12 1924-03-11 Hill Ebenezer Rotary pump
US1953253A (en) * 1931-03-04 1934-04-03 Ogilvie Henry Rotary compressor or pump
US3045778A (en) * 1960-03-10 1962-07-24 Roper Hydraulics Inc Lube pumping system
US3135460A (en) * 1960-10-19 1964-06-02 Gen Motors Corp Refrigerating apparatus
US3184157A (en) * 1962-06-20 1965-05-18 Gen Motors Corp Refrigerating apparatus
US3398886A (en) * 1966-09-21 1968-08-27 Trane Co Refrigerant compressor
US3432089A (en) * 1965-10-12 1969-03-11 Svenska Rotor Maskiner Ab Screw rotor machine for an elastic working medium
US3618577A (en) * 1968-04-11 1971-11-09 Continental Motors Corp Separator for fuel-air induction system
US3641744A (en) * 1969-07-22 1972-02-15 Farr Co Air filter for trucks

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1029309A (en) * 1909-12-20 1912-06-11 Stephen S Miles Air and gas compressor.
US1486835A (en) * 1922-10-12 1924-03-11 Hill Ebenezer Rotary pump
US1953253A (en) * 1931-03-04 1934-04-03 Ogilvie Henry Rotary compressor or pump
US3045778A (en) * 1960-03-10 1962-07-24 Roper Hydraulics Inc Lube pumping system
US3135460A (en) * 1960-10-19 1964-06-02 Gen Motors Corp Refrigerating apparatus
US3184157A (en) * 1962-06-20 1965-05-18 Gen Motors Corp Refrigerating apparatus
US3432089A (en) * 1965-10-12 1969-03-11 Svenska Rotor Maskiner Ab Screw rotor machine for an elastic working medium
US3398886A (en) * 1966-09-21 1968-08-27 Trane Co Refrigerant compressor
US3618577A (en) * 1968-04-11 1971-11-09 Continental Motors Corp Separator for fuel-air induction system
US3641744A (en) * 1969-07-22 1972-02-15 Farr Co Air filter for trucks

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888604A (en) * 1972-09-29 1975-06-10 Hitachi Ltd Compressor for a refrigerating machine
FR2303969A1 (fr) * 1975-03-13 1976-10-08 Central Automotive Ind Compresseur pour un gaz refrigerant
US4551069A (en) * 1984-03-14 1985-11-05 Copeland Corporation Integral oil pressure sensor
US5363740A (en) * 1993-07-16 1994-11-15 Pneumo Abex Corporation Fluid motor/pump with scavenged case
WO1995002749A1 (en) * 1993-07-16 1995-01-26 Pneumo Abex Corporation Fluid motor/pump with scavenged case
EP0708874A4 (en) * 1993-07-16 1996-09-18 Pneumo Abex Corp FLUID MOTOR / PUMP WITH BLADE HOUSING
US20060147318A1 (en) * 2002-08-17 2006-07-06 Oxford Magnet Technology Oil carry-over prevention from helium gas compressor
US20060093507A1 (en) * 2004-10-28 2006-05-04 Takahiro Yamaguchi Rotary pump for braking device
US7399171B2 (en) * 2004-10-28 2008-07-15 Advics Co., Ltd. Rotary pump for braking device
US7494329B2 (en) * 2005-11-28 2009-02-24 Lg Electronics Inc. Oil pump for a compressor
US20070160488A1 (en) * 2005-11-28 2007-07-12 Yoo Byung K Scroll compressor
US20070160489A1 (en) * 2005-11-28 2007-07-12 Yoo Byoung K Oil pump for a compressor
US7632081B2 (en) * 2005-11-28 2009-12-15 Lg Electronics Inc. Oil retrieving structure for a compressor
US20070134118A1 (en) * 2005-11-30 2007-06-14 Yoo Byoung K Oil pump for a compressor
US7717688B2 (en) * 2005-11-30 2010-05-18 Lg Electronics Inc. Oil pump for a compressor
US20090035160A1 (en) * 2007-07-30 2009-02-05 Byung-Kil Yoo Hermetic compressor and refrigeration cycle device having the same
US20090031753A1 (en) * 2007-07-30 2009-02-05 Byung-Kil Yoo Compressor
US8043079B2 (en) * 2007-07-30 2011-10-25 Lg Electronics Inc. Hermetic compressor and refrigeration cycle device having the same

Also Published As

Publication number Publication date
JPS4915561B1 (enrdf_load_stackoverflow) 1974-04-16

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