WO2002023101A1 - Structure de partie coulissante et structure de partie coulissante de moteur stirling - Google Patents

Structure de partie coulissante et structure de partie coulissante de moteur stirling Download PDF

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Publication number
WO2002023101A1
WO2002023101A1 PCT/JP2001/007752 JP0107752W WO0223101A1 WO 2002023101 A1 WO2002023101 A1 WO 2002023101A1 JP 0107752 W JP0107752 W JP 0107752W WO 0223101 A1 WO0223101 A1 WO 0223101A1
Authority
WO
WIPO (PCT)
Prior art keywords
displacer
piston
cross
sliding part
sliding
Prior art date
Application number
PCT/JP2001/007752
Other languages
English (en)
Japanese (ja)
Inventor
Naoki Jitsumasa
Original Assignee
Sharp Kabushiki Kaisha
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 Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2002023101A1 publication Critical patent/WO2002023101A1/fr

Links

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
    • 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
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/001—Gas cycle refrigeration machines with a linear configuration or a linear motor

Definitions

  • the present invention relates to a sliding portion structure and a sliding portion structure of a Stirling engine.
  • Fig. 12 shows a cross-sectional view of a conventional free-biston type Stirling refrigerator.
  • the free-biston type Stirling refrigerator 19 has a piston 1 and a displacer 4 in the piston-side cylinder 3 and the displacer-side cylinder 5 each having a cylindrical space therein.
  • a closed space is formed by providing a regenerator 11 between the compression space 9 and the expansion space 10 formed in the space, and the internal space of the free-bitston type starry refrigerator 19 is formed by a hemi-gas.
  • the piston 1 is reciprocated in the axial direction by external power such as a linear motor (not shown).
  • the reciprocating motion of the piston 1 causes a periodic pressure change in the working gas sealed in the working space (the compression space 9 and the expansion space 10), and a change in the flow rate of the gas passing through the regenerator 11.
  • the displacer 4 causes a periodic axial reciprocation.
  • the displacer 4 is fixed to one end of the displacer rod 6, and the piston is connected by a spring 12 connected between the other end of the displacer rod 6 that penetrates the biston 1 and the inner wall surface 18 of the cylinder.
  • a spring 12 While maintaining a predetermined phase difference in the same cycle as 1, it reciprocates in the displacer-side cylinder 5 in the axial direction.
  • the displacer 4 and the biston 1 reciprocate while maintaining an appropriate phase difference, the working gas enclosed in the working space forms a thermodynamic cycle known as a reverse Stirling cycle, and As a result, cold heat is generated in the expansion space 10.
  • the working gas in the compression space 9 compressed by the piston 1 re-enters the expansion space 10 via the regenerator 11.
  • the living creature 11 receives the cold energy stored a half cycle before and is precooled.
  • heat is mainly radiated to the outside via the high temperature side heat exchanger 13 and the radiator 14.
  • the expansion starts, and the working gas enters the compression space 9 while discharging cold heat to the regenerator 11 in the reverse order.
  • heat is mainly taken from the outside through the low temperature side heat exchanger 15 and the heat absorber 16 to cool the outside.
  • Extremely low temperature cooling can be obtained by repeating the above cycle continuously.
  • FIG. 13 is a cross-sectional view of a conventional biston.
  • the cross-sectional end shape 2b of the biston 1 is a right angle.
  • FIG. 14 is a cross-sectional view of another conventional piston.
  • the cross-sectional end shape 2c of the piston 1 is chamfered.
  • Gas bearings that is, gas bearings
  • gas bearings may be used for fitting parts such as pistons and piston-side cylinders, displacers and displacer-side cylinders, and displacer rods and piston holes.
  • Figure 15 shows a cross-sectional view of a conventional biston-side cylinder equipped with a piston and a gas-pairing pad.
  • the cross-sectional end shape 2b of the gas pairing pad 8b provided on the biston-side cylinder 3 is a right angle.
  • the cross-sectional end shape 2b may be chamfered in the same manner as the cross-sectional end shape 2c of the piston 1 in FIG.
  • the input loss can be reduced and the output can be improved by preventing the load from being applied to the moving part, and the durability of the sliding part, that is, the life of the refrigerator can be reduced. Is improved.
  • the sliding part can be operated in a non-contact or light load state due to the effects of gas bearings and the like during stable operation, but each part operates.
  • the sliding parts When the sliding parts are suddenly touched, such as when the sliding parts are tilted due to disturbances at the start or during operation. A large load is applied to the end portion, which adversely affects the operation state and causes a problem such as an increase in loss, that is, a decrease in performance.
  • the surface of the sliding part is seriously damaged, and scratches and abrasion powder are generated.
  • a thin film surface treatment such as plating or coating is used for the sliding part, they are peeled off, and the life of the refrigerator is shortened.
  • burrs are likely to be generated at the end of the part in part molding, and in the thin film surface treatment (coating, resin coating, PVD coating, CVD coating, etc.), the end of the part due to surface tension etc. Since the bulges, the end of the part becomes more stress-concentrated.
  • the clearance of the fitting part of the sliding part may be as small as several tens of meters. In this case, it is difficult to adjust the fitting position at the time of assembling, and in particular, there is a problem that the end of each part is damaged. Disclosure of the invention
  • the present invention provides a slide that is easy to assemble, has a small output loss, can suppress damage to the surface of a sliding portion, has stable high performance, and has a long life. It is an object of the present invention to provide a part structure and a sliding part structure of a Stirling engine. In addition, the present invention eliminates the gas bearing pad orifice and enables simplification of parts and cost reduction.As a result, gas supply from the orifice becomes unnecessary, and the input of external power is reduced. It is an object of the present invention to provide a sliding portion structure that can improve the performance as a product and a sliding portion structure of a Stirling engine.
  • a cross-sectional end shape of a sliding component or a component to be fitted to the sliding component is: It has a curvature on the fitting side.
  • the sliding component can be a piston
  • the component fitted to the sliding component can be a cylinder
  • cross-sectional end portions of the sliding component and the component fitted to the driving component may have the same curvature on the fitting side.
  • the piston is reciprocated inside the piston side cylinder, and is driven by the action of the working gas which is compressed and expanded by the movement of the biston.
  • a displacer that moves back and forth inside the displacer-side cylinder; and a displacer rod that is fixed to the displacer and penetrates a hole formed in the piston.
  • a compression space is interposed between the displacer, and an expansion space is provided on the opposite side of the displacer to the biston, and a back space is provided on the opposite side of the biston to the opposite side of the displacer.
  • the piston, the piston side cylinder, the displacer, At least one cross-sectional end of the displacer-side cylinder, the displacer rod, and the piston hole has a curvature on the fitting side.
  • a cross-sectional end portion may have the same curvature on the mating side.
  • the gas bearing pad provided in at least one of the piston, the piston-side cylinder, the displacer, the displacer-side cylinder, the displacer rod, and the piston hole has an end shape in cross section. It may have a curvature.
  • the fitting position can be maintained without damaging the end portions of each component during assembly. Position, making it easier to assemble. Furthermore, since stress concentration on the end of the sliding component or the end of the component fitted to the sliding component due to disturbance can be reduced, stable high performance and long life can be realized.
  • the cross-sectional end shape of the sliding component and the component to be fitted to the sliding component have the same curvature on the fitting side, disturbance or the like at the start of operation or during operation. If the sliding parts are tilted due to, the stress can be evenly distributed at the ends of both parts, so that output loss can be reduced and damage to the sliding part surface can be suppressed.
  • FIG. 1 is a cross-sectional view of a piston and a piston-side cylinder according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a biston and a biston-side cylinder according to a second embodiment of the present invention.
  • 3 is a cross-sectional view of a biston and a biston-side cylinder according to a third embodiment of the present invention, and
  • FIG. 4 is a cross-section of a displacer, a displacer rod, and a displacer-side cylinder according to a fourth embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a displacer, a displacer rod, and a displacer-side cylinder according to a fifth embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a displacer, a displacer rod, and a cylinder on a displacer side according to a sixth embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a displacer, a displacer rod, and a piston according to a seventh embodiment of the present invention.
  • FIG. 8 is a cross-sectional view of a displacer, a displacer rod, and a piston according to an eighth embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of a display, a display rod, and a piston according to a ninth embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of the free biston type Stirling refrigerator of the tenth embodiment of the present invention.
  • Fig. 11 is a cross-sectional view of a gas bearing pad according to a first embodiment of the present invention
  • Fig. 12 is a cross-sectional view of a conventional free-biston type stirling refrigerator
  • FIG. 13 is a cross-sectional view of a conventional piston.
  • FIG. 14 is a cross-sectional view of another conventional biston.
  • Figure 15 is a cross-sectional view of a piston-side cylinder provided with a conventional biston and gas bearing pad.
  • FIG. 1 is a cross-sectional view of a piston and a piston-side cylinder according to the first embodiment.
  • the cross-sectional end shape 2a has a curvature.
  • FIG. 2 is a cross-sectional view of the biston and piston-side cylinder of the second embodiment.
  • the cross-sectional end shape 2a has a curvature on the fitting side.
  • FIG. 3 is a cross-sectional view of a piston and a piston-side cylinder according to the third embodiment. Piston 1 and piston-side cylinder 3 have the same cross-sectional end shape 2a on the mating side It has a curvature.
  • FIG. 4 is a cross-sectional view of a displacer, a displacer rod, and a cylinder on a display side according to a fourth embodiment.
  • the displacer 4 disposed inside the displacer-side cylinder 5 has a cross-sectional end shape 2a having a curvature.
  • FIG. 5 is a cross-sectional view of a displacer, a displacer rod, and a cylinder on the display side according to a fifth embodiment.
  • the cross-sectional end shape 2a has a curvature on the fitting side.
  • FIG. 6 is a cross-sectional view of a displacer, a displacer rod, and a cylinder on a display side according to a sixth embodiment.
  • the displacer 4 and the displacer-side cylinder 5 have the same curvature in the cross-sectional end shape 2a on the fitting side.
  • FIG. 7 is a cross-sectional view of the displacer, displacer rod, and biston according to the seventh embodiment.
  • the displacer 4 is fixed to one end of the displacer rod 6, and the other end of the displacer rod 6 that penetrates the screw hole 7 has a curvature in a cross-sectional end shape 2a.
  • FIG. 8 is a cross-sectional view of the displacer, displacer rod, and biston according to the eighth embodiment.
  • the displacer 4 is fixed to one end of the displacer rod 6, and a screw hole 7 through which the displacer rod 6 penetrates has a cross-sectional end shape 2a having a curvature.
  • FIG. 9 is a cross-sectional view of the displacer, displacer rod, and biston according to the ninth embodiment.
  • the displacer 4 is fixed to one end of the displacer rod 6, and the other end of the displacer rod 6 which penetrates the piston hole 7 and the piston hole 7 has the same curvature in the cross-sectional end shape 2a. are doing.
  • the bending of each sliding component or a component fitted to the sliding component is performed.
  • the shape of the cross-sectional end having a certain ratio is formed on one or both sides.
  • a curvature may be provided at the end of the sliding component that comes into contact with the sliding component or the component that fits into the sliding component during sliding or assembly. If a curvature is provided at the ⁇ side end of the sliding component, by making them have the same curvature, stress concentration on the end during operation is further reduced.
  • FIG. 10 shows a tenth embodiment, and is a cross-sectional view of a free-biston-type Stirling refrigerator having the third, sixth, and ninth embodiments.
  • the cross-sectional end shapes 2 a of the piston 1 and the piston side cylinder 3, the displacer 4 and the displacer side cylinder 5, the displacer rod 6 and the screw hole 7 to be fitted have the same curvature respectively. are doing.
  • Other components are the same as the conventional product shown in FIG. Since this embodiment is a combination of the first to ninth embodiments, the stability during operation is the best, and the input of external power can be minimized.
  • FIG. 11 is a cross-sectional view of the gas bearing pad of the first embodiment.
  • the cross-sectional end shape 2a of the gas bearing pad 8a has a curvature.
  • the location for forming the gas bearing pad 8a is not particularly limited as long as it is a sliding surface of a sliding component or a component fitted to the sliding component.
  • the sliding components of the first to eleventh embodiments or the components fitted to the sliding components have a local structure similar to that of the conventional product. There is almost no difference from sliding parts or parts fitted to sliding parts.
  • the present invention by providing a curvature at the end of the sliding component or the component fitted to the sliding component, stress concentration on the end due to disturbance or the like, which has been a problem in the past, is alleviated, and the life is extended, A reduction in input loss of external power has been achieved, and a sliding section structure with excellent assemblability has been realized.
  • the sliding portion structure of the present invention and the sliding portion structure of a Stirling engine can be used for various engines and devices having a sliding portion structure, such as a Stirling refrigerator used as a cooler of a refrigerator or the like. it can.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne une structure de partie coulissante, dans laquelle la section transversale d'une partie coulissante ou d'une partie adaptée à la partie coulissante présente une certaine courbure au niveau de sa partie d'extrémité et les sections transversales d'un piston et d'un cylindre latéral de piston, un piston déplaceur, un cylindre latéral de piston déplaceur, une tige de piston déplaceur et un orifice de piston présentent une courbure identique au niveau de leurs parties d'extrémité. Cette invention permet un assemblage rapide, une réduction des pertes de rendement, une suppression des dommages à la surface de la partie coulissante, une grande efficacité assurée de manière stable, ainsi qu'un augmentation de la durée de vie.
PCT/JP2001/007752 2000-09-14 2001-09-06 Structure de partie coulissante et structure de partie coulissante de moteur stirling WO2002023101A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-279192 2000-09-14
JP2000279192A JP2002089985A (ja) 2000-09-14 2000-09-14 摺動部構造及びスターリング機関の摺動部構造

Publications (1)

Publication Number Publication Date
WO2002023101A1 true WO2002023101A1 (fr) 2002-03-21

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WO (1) WO2002023101A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7458215B2 (en) 2003-10-01 2008-12-02 Toyota Jidosha Kabushiki Kaisha Stirling engine and hybrid system with the same
KR101658737B1 (ko) * 2015-09-09 2016-09-22 한국기계연구원 맥동관 냉동기용 위상조절장치 및 맥동관 냉동기

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165550U (ja) * 1983-04-20 1984-11-06 サンデン株式会社 熱ガス機関の構造
US5966936A (en) * 1998-06-04 1999-10-19 Raytheon Company Pin coupling for reduced side loads in a driven displacer-piston link and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165550U (ja) * 1983-04-20 1984-11-06 サンデン株式会社 熱ガス機関の構造
US5966936A (en) * 1998-06-04 1999-10-19 Raytheon Company Pin coupling for reduced side loads in a driven displacer-piston link and method

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JP2002089985A (ja) 2002-03-27

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