WO2011093085A1 - Machine hydraulique - Google Patents

Machine hydraulique Download PDF

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Publication number
WO2011093085A1
WO2011093085A1 PCT/JP2011/000458 JP2011000458W WO2011093085A1 WO 2011093085 A1 WO2011093085 A1 WO 2011093085A1 JP 2011000458 W JP2011000458 W JP 2011000458W WO 2011093085 A1 WO2011093085 A1 WO 2011093085A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
oil
connecting rod
frame
oil supply
Prior art date
Application number
PCT/JP2011/000458
Other languages
English (en)
Japanese (ja)
Inventor
輝夫 樋口
Original Assignee
サンデン株式会社
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 サンデン株式会社 filed Critical サンデン株式会社
Priority to BR112012018671A priority Critical patent/BR112012018671A2/pt
Priority to CN2011800075591A priority patent/CN102725528A/zh
Priority to MX2012008747A priority patent/MX2012008747A/es
Priority to CA2787319A priority patent/CA2787319A1/fr
Priority to US13/576,152 priority patent/US20120301330A1/en
Priority to EP11736800A priority patent/EP2514971A1/fr
Publication of WO2011093085A1 publication Critical patent/WO2011093085A1/fr

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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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0261—Hermetic compressors with an auxiliary oil 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • 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
    • 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
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F04C2210/261—Carbon dioxide (CO2)

Definitions

  • the present invention relates to a fluid machine, and more particularly to a fluid machine suitable for a hermetic reciprocating compressor that compresses a carbon dioxide refrigerant.
  • a sealed container that stores lubricating oil in the inner bottom
  • an electric motor provided in the sealed container
  • a piston provided in the sealed container and driven by the electric motor via a rotating shaft
  • the piston is reciprocated and the compression mechanism consisting of a cylinder block in which a cylinder bore is formed from the suction to the discharge of the working fluid, and the lubricating oil stored in the inner bottom is sealed using the centrifugal force generated by the rotation of the rotating shaft
  • a hermetic compressor including a lubrication mechanism that supplies an upper portion of a container is known.
  • Patent Document 1 an oil supply hole that communicates with the inside and outside of the cylinder bore is provided in the cylinder block, and an annular groove is formed on the outer peripheral surface of the piston.
  • the oil supply hole communicates with the annular groove when the piston is located at the bottom dead center.
  • a hermetic compressor is disclosed that communicates with a cylinder bore when the piston is located at the top dead center.
  • the present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a fluid machine that can improve lubrication performance and improve reliability.
  • a fluid machine includes a sealed container for storing lubricating oil in an inner bottom, a drive unit provided in the sealed container, and a rotary unit provided in the sealed container.
  • the driven unit consisting of a cylinder block formed with a cylinder bore in which the piston is driven reciprocally and the piston is reciprocated and the working fluid is sucked to discharged, and the lubricating oil stored in the inner bottom portion is sealed by the rotating shaft Lubrication mechanism that supplies to the upper part of the container, and a frame that is fixed to the sealed container, contacts the upper surface of the cylinder block to support the driven unit, and the lubricating oil supplied to the upper part of the sealed container flows down to the upper surface A connecting rod connecting the rotating shaft and the piston, and a piston pin connecting the connecting rod and the piston.
  • the first oil supply hole is located immediately above the piston pin, and the second oil supply hole is located directly above the connecting rod. Further, when the piston is located at the top dead center, the first and second oil supply holes are located immediately above the connecting rod. Furthermore, the frame has an oil sump portion in which the openings of the first and second oil supply holes are countersunk.
  • the connecting rod has an oil groove portion on the upper surface thereof from the rotating shaft side to the vicinity of the piston pin. Further, the pressure of the working fluid sucked into the driven unit and discharged from the driven unit acts in the sealed container, and the working fluid is a carbon dioxide refrigerant (Claim 6).
  • the fluid machine of the first aspect of the present invention by providing the first and second oil supply holes, the piston, the piston pin, and the piston arranged on the lower side of the frame through the first and second oil supply holes, and Lubricating oil can be reliably dripped onto the connecting rod.
  • the frame is fixed to the sealed container, and centrifugal force due to the rotation of the rotating shaft does not act on the lubricating oil flowing down from the upper part of the sealed container to the upper surface of the frame.
  • the lubricating oil can effectively lubricate the driven unit without being affected by the centrifugal force, so that the lubricating performance of the fluid machine can be improved and the reliability can be improved.
  • the first oil supply hole is located immediately above the piston pin, and the second oil supply hole is located directly above the connecting rod.
  • the lubricating oil is dropped directly from the first oil supply hole to the piston pin without being affected by the pressure of the working fluid leaking slightly from the cylinder bore.
  • the lubricating oil can be dropped directly from the second oil supply hole to the connecting rod.
  • the first and second oil supply holes are located immediately above the connecting rod, so that the piston is located at the top dead center and the cylinder bore is operated. Even at the time when the pressure of the fluid rises, the lubricating oil can be dropped directly from each oil supply hole to at least the connecting rod. Thereby, since the driven unit can be more effectively lubricated, the lubrication performance of the fluid machine can be further enhanced.
  • the frame has the oil sump portion, so that the lubricating oil flowing down from the upper part in the sealed container to the upper surface of the frame is temporarily stored, and the lubricating oil is dropped intermittently little by little.
  • the driven unit can be more effectively lubricated, so that the lubrication performance of the fluid machine can be further enhanced.
  • the connecting rod since the connecting rod has the oil groove portion on the upper surface thereof, the lubricating oil dropped from the first and second oil supply holes to the connecting rod is connected to the connecting rod, the rotary shaft, and the piston pin. Can lead to the part.
  • the driven unit can be more effectively lubricated, the lubrication performance of the fluid machine can be further enhanced.
  • the pressure of the working fluid discharged from the cylinder bore is high, the pressure of the working fluid leaking from the cylinder bore and acting in the sealed container is also high. There is a risk. Therefore, the influence of the pressure of the working fluid on the lubricating oil when the lubricating oil is dropped directly from the first oil supply hole directly onto the piston pin is large, but according to the above configuration, the pressure of the working fluid is not affected. It is preferable that the driven unit can be effectively lubricated and the lubrication performance of the fluid machine can be improved.
  • FIG. 2 is an enlarged view of a main part showing a lubrication path for a compression mechanism when the piston of FIG. 1 is located at a bottom dead center.
  • FIG. 2 is an enlarged view of a main part showing a lubrication path for a compression mechanism when the piston of FIG. 1 is located at a top dead center.
  • the compressor 1 is a hermetic reciprocating compressor, and is categorized in detail as a positive displacement compressor called a reciprocating compressor or a piston compressor.
  • a configuration of a refrigeration cycle (not shown) incorporated in a vending machine. Used as equipment.
  • the refrigeration cycle includes a path through which a refrigerant as a working fluid of the compressor 1 circulates.
  • a carbon dioxide refrigerant that is a non-flammable natural refrigerant is used as the refrigerant.
  • the compressor 1 includes an airtight container 2, and an electric motor (drive unit) 4 and a compression mechanism (driven unit) to which the driving force of the electric motor 4 is transmitted are enclosed in the airtight container 2. 6) is housed.
  • the sealed container 2 has a shell structure in which a top shell 2A covering the electric motor 4 side and a bottom shell 2B covering the compression mechanism 6 side are welded.
  • the longitudinal direction of the electric motor 4 is accommodated in the depth direction of the top shell 2A, and the top shell 2A has a deep bottom shape as compared with the bottom shell 2B.
  • the longitudinal direction of the compression mechanism 6 is accommodated in the radial direction of the bottom shell 2B, and the bottom shell 2B has a shallower shape than the top shell 2A.
  • the electric motor 4 includes a stator 8 that generates a magnetic field by power feeding and a rotor 10 that rotates by the magnetic field generated by the stator 8.
  • the rotor 10 is disposed on the same axis on the inner side of the stator 8.
  • the main shaft 24 of the rotary shaft 14 is fixed by shrinkage fitting. Electric power is supplied to the stator 8 from the outside of the compressor 1 through an electrical component 12 fixed to the sealed container 2 and a lead wire (not shown).
  • the compression mechanism 6 includes a crankshaft 14, a cylinder block 16, a piston 18, a connecting rod 20, and the like.
  • the crankshaft 14 is composed of an eccentric shaft portion 22 and a main shaft portion 24, and is disposed at a position orthogonal to the connecting rod 20.
  • a cylinder bore 26 is formed integrally with the cylinder block 16, and a cylinder gasket 28, a later-described suction valve 50, and a valve plate 30 are sequentially arranged from the cylinder block 16 side so as to close the opening of the cylinder bore 26.
  • the head gasket 32 and the cylinder head 34 are pressed and fixed by bolts.
  • the stator 8 is bolted to the cylinder block 16 via a frame 36, and the frame 36 is fixed to the sealed container 2.
  • the frame 36 is in contact with the upper surface 16 a of the cylinder block 16.
  • the electric motor 4 and the compression mechanism 6 are supported by a pedestal portion 38 below the frame 36, and the frame 36 is fixed to the sealed container 2 by the pedestal portion 38.
  • the bearing 42 of the main shaft portion 24 is disposed on the inner peripheral surface 40a, and the thrust trace (bearing) that receives the thrust load of the rotor 10 on the upper end surface 40b of the cylindrical portion 40.
  • a bearing 44 such as a thrust washer is disposed.
  • the valve plate 30 includes a refrigerant suction hole 46 and a discharge hole 48, both of which are opened and closed by a suction valve 50 and a discharge valve 52, which are reed valves, respectively.
  • the cylinder head 34 includes a refrigerant suction chamber 54 and a discharge chamber 56.
  • the discharge valve 52 When the discharge valve 52 is opened in the compression stroke of the piston 18, the discharge chamber 56 communicates with the cylinder bore 26 through the discharge hole 48.
  • the intake valve 50 is opened during the intake stroke of the piston 18, the intake chamber 54 communicates with the cylinder bore 26 via the intake hole 46.
  • a suction pipe 58 and a discharge pipe 60 are fixed to the sealed container 2, and one ends of the suction and discharge pipes 58 and 60 are connected to a suction chamber 54 and a discharge chamber 56 of the cylinder head 34, respectively.
  • the other ends of the suction and discharge pipes 58 and 60 are connected to a refrigeration cycle via a suction muffler and a discharge muffler (not shown), and these mufflers reduce the pulsation and noise of the refrigerant flowing between the compressor 1 and the refrigeration cycle. ing.
  • the connecting rod 20 is provided with a large end 62 to which the eccentric shaft portion 22 of the crankshaft 14 is rotatably connected at one end, and a small end 64 to which the piston 18 is reciprocally connected at the other end. It has been.
  • the small end portion 64 is connected to the piston 18 by a piston pin 66, and the piston pin 66 is secured to the piston 18 by a fixing pin 68.
  • the connecting rod 20 swings in conjunction with the eccentric rotation of the eccentric shaft portion 22 with the piston pin 66 as a fulcrum, and the piston 18 interlocks with the swinging motion of the connecting rod 20. It reciprocates in the cylinder bore 26.
  • the discharge pressure of the refrigerant mainly acts in the sealed container 2, and a small amount of lubricating oil for lubricating the sliding portions of the electric motor 4 and the compression mechanism 6, such as the bearings 42 and 44, in the inner bottom portion 2 a of the sealed container 2.
  • an oil passage (lubricating mechanism) 70 is drilled from the substantially axial position of the lower end surface 22 a of the eccentric shaft portion 22 to the middle of the main shaft portion 24.
  • An upper portion of the oil passage 70 is opened from the outer peripheral surface 24 a of the main shaft portion 24, and an oil pipe (lubricating mechanism) 72 is connected to the lower portion of the oil passage 70.
  • the oil pipe 72 has an inclined portion 74 which is inclined from the substantially axial center of the eccentric shaft portion 22 toward the axial center of the main shaft portion 24 on the distal end side. It extends to the oil reservoir 76 having a concave shape in sectional view formed in the inner bottom 2a.
  • the oil sump portion 76 is formed to have a size and depth that allow a small amount of lubricating oil, for example, about 200 cc, to be stored so that the oil level is higher than the tip position of the oil pipe 74.
  • a centrifugal force acts on the lubricating oil in the inclined portion 74 in the oil pipe 72 in an obliquely upward outward direction. Is pumped from the oil reservoir 76 to the oil passage 74.
  • the operation and action of the compressor 1 will be described.
  • the rotor 10 fixed to the main shaft portion 24 is rotated by supplying power to the stator 8, and consequently the crankshaft 14 is rotated, and the piston 18 reciprocates in the cylinder bore 26 via the connecting rod 20.
  • the reciprocating motion of the piston 18 causes the refrigerant to be sucked into the cylinder bore 26 from the refrigeration cycle, and the refrigerant is compressed by the cylinder bore 26 and further discharged to the refrigeration cycle.
  • the piston 18 operates in the direction of decreasing the volume of the cylinder bore 26 and the refrigerant in the cylinder bore 26 is compressed and the pressure in the cylinder bore 26 exceeds the discharge pressure of the refrigerant, the pressure in the cylinder bore 26 and the discharge chamber 56 are increased.
  • the discharge valve 52 opens due to the difference from the internal pressure. The compressed refrigerant is guided to the discharge chamber 56 via the discharge hole 48 and discharged to the refrigeration cycle via the discharge pipe 60.
  • the pressure in the cylinder bore 26 decreases.
  • the discharge valve 52 closes according to the difference between the pressure in the cylinder bore 26 and the pressure in the discharge chamber 56.
  • the suction valve 50 opens according to the difference between the pressure in the cylinder bore 26 and the pressure in the suction chamber 54. The refrigerant in the refrigeration cycle is guided to the suction chamber 54 through the suction pipe 58 and is sucked into the cylinder bore 26 through the suction hole 46.
  • a part of the lubricating oil flowing out from the oil passage 70 rises along an outer circumferential groove (not shown) formed in the crankshaft 14 due to (e) centrifugal force, and enters the gap between the crankshaft 14 and the frame 36.
  • the bearing 42 is lubricated while forming an oil film, and moves to the upper end side of the crankshaft 14. Then, (f) the lubricating oil reaches the upper end surface 40b of the cylindrical portion 40 and lubricates the bearing 44, and then (g) passes through the gap between the rotor 8 and the frame 36, and the upper surface 38a of the pedestal portion 38 of the frame 36. To flow down.
  • the lubricating oil flowing down to the upper surface 38a is formed by (h) a first oil supply hole 78 formed through the pedestal portion 38 and the cylinder block 16 of the frame 36 and (i) penetrating the pedestal portion 38 of the frame 36. After passing through the second oil supply hole 80 to lubricate the compression mechanism 6, (d) it flows down to the oil reservoir 76. On the other hand, the lubricating oil that cannot pass through the bearing 44 (j) rises as it is up the inner wall surface 10 a of the rotor 10 to the upper end of the rotor 10, and (k) is scattered by the centrifugal force due to the rotation of the rotor 10.
  • the first oil supply hole 78 is formed at a position directly above the piston pin 66 when the piston 18 is located at the bottom dead center. Lubricating oil dropped from the first oil supply hole 78 when the piston 18 is located at the bottom dead center flows toward the sliding portion of the piston pin 66 with respect to the piston 18 as indicated by an arrow, and the piston pin 66 passes through the piston pin 66. It can be lubricated directly.
  • each of the oil supply holes 78 and 80 is composed of oil sump portions 82 and 84 and lower pores 86 and 88, respectively.
  • the oil sump portions 82 and 84 are lubricated by flowing down to the upper surface 38a. Oil is temporarily stored.
  • the oil sump portions 82 and 84 are formed by spotting the openings of the oil supply holes 78 and 80 in the pedestal portion 38 of the frame 36.
  • the oil sump portion 82 extends from the pedestal portion 38 to the middle of the cylinder block 16. Is formed.
  • Each of the pores 86 and 88 is narrowed in diameter from the oil reservoirs 82 and 84 according to the kinematic viscosity of the lubricating oil to be used, and the lubricant stored in the oil reservoirs 82 and 84 is fine. By passing through the holes 86 and 88, one or several drops are intermittently dropped on the compression mechanism 6 side.
  • an oil groove 90 is recessed in the upper surface 20a of the connecting rod 20 from the crankshaft 14 side to the vicinity of the piston pin 66.
  • the lubricating oil dropped from the second oil supply hole 80 to the oil groove 90 when the piston 18 is located at the bottom dead center is moved to the large end 62 side and the small end as shown by the arrows by the swinging movement of the connecting rod 20.
  • the connecting rod 20 can be lubricated around the large end 62 and the small end 64 where the connecting rod 20 is connected to the crankshaft 14 and the piston 18 side.
  • the first and second oil supply holes 78 and 80 are formed at positions directly above the connecting rod 20 when the piston 18 is located at the top dead center.
  • the lubricating oil dropped from the oil supply holes 78 and 80 into the oil groove 90 is moved by the swinging movement of the connecting rod 20 to the large end 62 side and as shown by the arrows.
  • the connecting rod 20 can be lubricated in the vicinity of the large end 62 and the small end 64 where the connecting rod 20 is connected to the crankshaft 14 and the piston 18 side.
  • the second oil supply hole 80 is opened at a position blocked by the opening end wall 16b on the opposite side to the side on which the cylinder head 34 of the cylinder block 16 is fixed, and the lubricating oil that has passed through the second oil supply hole 80 is opened. While flowing down the end wall 16b, it flows down to the vicinity of the connecting rod 20 and the skirt 18a of the piston 18.
  • the lubricating oil can be surely dropped on the piston pin 66 and the connecting rod 20. This is because the frame 36 is fixed to the sealed container 2, and the centrifugal force due to the rotation of the crankshaft 14 does not act on the lubricating oil flowing down from the upper part in the sealed container 2 to the upper surface 38 a of the frame 36.
  • the lubricating oil can effectively lubricate the compression mechanism 6 without being affected by the centrifugal force, the lubricating performance of the compressor 1 can be improved and the reliability can be improved.
  • the first oil supply hole 78 is located immediately above the piston pin 66, and the second oil supply hole 80 is located directly above the connecting rod 20, so that the piston 18 is bottom dead.
  • the lubricating oil is directly applied to the piston pin 66 from the first oil supply hole 78 without being affected by the pressure of the refrigerant gas slightly leaking from the cylinder bore 26.
  • the lubricating oil can be dropped, and the lubricating oil can be dropped directly from the second oil supply hole 80 to the connecting rod 20.
  • the first and second oil supply holes 78 and 80 are located immediately above the connecting rod 20, whereby the piston 18 is located at the top dead center and the refrigerant of the cylinder bore 26. Even at the time when the pressure rises, the lubricating oil can be dripped directly into at least the connecting rod 20 from each of the oil supply holes 78 and 80. Thereby, since the compression mechanism 6 can be lubricated more effectively, the lubrication performance of the compressor 1 can be further improved.
  • the frame 36 has the oil sump portions 82 and 84, the lubricating oil flowing down from the upper part in the sealed container 2 to the upper surface 38a of the frame 36 is temporarily stored, and the lubricating oil is dropped intermittently little by little. This makes it possible to lubricate the compression mechanism 6 more effectively, so that the lubricating performance of the compressor 1 can be further enhanced.
  • the connecting rod 20 has the oil groove portion 90 on the upper surface 20a, the lubricating oil dropped from the first and second oil supply holes 78 and 80 to the connecting rod 20 is connected to the connecting rod 20, the crankshaft 14, and the piston pin 66. Can be led to the large end 62 and the small end 64 which are connecting portions. Thereby, since the compression mechanism 6 can be lubricated more effectively, the lubrication performance of the compressor 1 can be further improved.
  • the working fluid of the compressor 1 of the present embodiment is a carbon dioxide refrigerant, it is not limited to this.
  • the working fluid is carbon dioxide refrigerant
  • the pressure of the working fluid discharged from the compression mechanism 6 becomes high to the supercritical state, and the pressure acting on the sealed container 2 may be high. Therefore, the influence of the pressure of the working fluid on the lubricating oil when the lubricating oil is dropped directly from the first oil supply hole 78 directly onto the piston pin 66 is large.
  • the pressure of the working fluid is affected. Therefore, the compression mechanism 6 can be effectively lubricated, and the lubrication performance of the compressor 1 can be improved, which is preferable.
  • the present Example demonstrates the positive displacement type compressor 1, this invention is applicable to general sealed fluid machines, such as a scroll compressor and an expander, These fluid machines are other than a vending machine. Of course, it can be used as a component device of a refrigeration cycle incorporated in the.
  • Compressor (fluid machine) 2 Sealed container 2a Inner bottom 4 Electric motor (drive unit) 6 Compression mechanism (driven unit) 14 Crankshaft (Rotating shaft) 16 cylinder block 16a upper surface 18 piston 20 connecting rod 20a upper surface 26 cylinder bore 36 frame 38a upper surface 66 piston pin 70 oil passage (lubrication mechanism) 72 Oil pipe (Lubrication mechanism) 78 1st oil supply hole 80 2nd oil supply hole 82 Oil sump part 84 Oil sump part 90 Oil groove part

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une machine hydraulique dont les propriétés de lubrification et la fiabilité peuvent être améliorées. La machine hydraulique est équipée de mécanismes de lubrification (70, 72) qui fournissent à la partie supérieure d'un réservoir étanche (2) de l'huile de lubrification contenue dans une partie inférieure (2a) au moyen d'un arbre rotatif (14), d'un cadre (36) qui est fixé au réservoir étanche et vient en butée avec la surface supérieure (16a) d'un bloc cylindre (16) pour supporter une unité entraînée (6), de sorte que l'huile de lubrification fournie à la partie supérieure du réservoir étanche tombe sur la surface supérieure (38a), d'une bielle (20) qui est agencée sous le cadre et relie l'arbre rotatif à un piston (18), d'un axe de piston (66) qui relie la bielle au piston, d'un premier port de remplissage d'huile (78) qui traverse le cadre et le bloc cylindre, et d'un second port de remplissage d'huile (80) qui traverse le cadre.
PCT/JP2011/000458 2010-01-28 2011-01-27 Machine hydraulique WO2011093085A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR112012018671A BR112012018671A2 (pt) 2010-01-28 2011-01-27 máquina de fluido
CN2011800075591A CN102725528A (zh) 2010-01-28 2011-01-27 流体机械
MX2012008747A MX2012008747A (es) 2010-01-28 2011-01-27 Maquina de fluido.
CA2787319A CA2787319A1 (fr) 2010-01-28 2011-01-27 Machine hydraulique
US13/576,152 US20120301330A1 (en) 2010-01-28 2011-01-27 Fluid Machine
EP11736800A EP2514971A1 (fr) 2010-01-28 2011-01-27 Machine hydraulique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-016374 2010-01-28
JP2010016374A JP2011153587A (ja) 2010-01-28 2010-01-28 流体機械

Publications (1)

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WO2011093085A1 true WO2011093085A1 (fr) 2011-08-04

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PCT/JP2011/000458 WO2011093085A1 (fr) 2010-01-28 2011-01-27 Machine hydraulique

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CA (1) CA2787319A1 (fr)
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JP2009197684A (ja) 2008-02-21 2009-09-03 Toshiba Carrier Corp 密閉型圧縮機及び冷凍サイクル装置

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JPS52153104A (en) * 1976-06-16 1977-12-20 Hitachi Ltd Ventilation for electric rotary machine
JPH09112428A (ja) * 1995-10-20 1997-05-02 Matsushita Refrig Co Ltd 密閉型圧縮機
JP2000356187A (ja) * 1999-06-14 2000-12-26 Matsushita Refrig Co Ltd 密閉型電動圧縮機
JP2008223506A (ja) * 2007-03-09 2008-09-25 Matsushita Electric Ind Co Ltd 密閉型圧縮機
JP2009197684A (ja) 2008-02-21 2009-09-03 Toshiba Carrier Corp 密閉型圧縮機及び冷凍サイクル装置

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KR20120102156A (ko) 2012-09-17
JP2011153587A (ja) 2011-08-11
MX2012008747A (es) 2012-11-23
CN102725528A (zh) 2012-10-10
US20120301330A1 (en) 2012-11-29
BR112012018671A2 (pt) 2016-05-03
EP2514971A1 (fr) 2012-10-24
CA2787319A1 (fr) 2011-08-04

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