WO2008059784A1 - Compresseur - Google Patents

Compresseur Download PDF

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Publication number
WO2008059784A1
WO2008059784A1 PCT/JP2007/071896 JP2007071896W WO2008059784A1 WO 2008059784 A1 WO2008059784 A1 WO 2008059784A1 JP 2007071896 W JP2007071896 W JP 2007071896W WO 2008059784 A1 WO2008059784 A1 WO 2008059784A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cylinder bore
cylindrical surface
compressor
top side
Prior art date
Application number
PCT/JP2007/071896
Other languages
English (en)
Japanese (ja)
Inventor
Iwao Uchikado
Original Assignee
Sanden Corporation
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 Sanden Corporation filed Critical Sanden Corporation
Publication of WO2008059784A1 publication Critical patent/WO2008059784A1/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
    • 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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • 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
    • F04B39/0005—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 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • the present invention relates to a compressor in which a piston is reciprocally inserted into a cylinder bore.
  • the present invention relates to a compressor capable of preventing peeling of a coating applied to a piston.
  • a “Teflon” (registered trademark) system is provided on the piston cylindrical surface. Apply coating, or apply Teflon coating to the cylindrical surface, and apply groove processing to one or more parts of the cylindrical surface to mount one or more Teflon piston rings for each piston.
  • Teflon registered trademark
  • the connecting portion between the chamfered portion and the recess and the cylindrical surface of the cylinder bore has an edge shape. There are many cases. Therefore, the piston chamfered portion slides on this part with high surface pressure. In addition, there is a problem that the coating is more easily peeled off.
  • an object of the present invention is to prevent the peeling of the piston coating without increasing the size of the compressor by an inexpensive method, and to improve the durability of the compressor.
  • a compressor according to the present invention includes a piston with respect to an axial direction and / or a circumferential direction of a cylinder bore of a compression mechanism in which a piston is inserted in a reciprocating motion within the cylinder bore.
  • the top side chamfered portion and the piston cylindrical surface are connected to the top side chamfered portion of the cylinder bore or the connecting portion between the recess and the cylinder bore cylindrical surface. Consists of.
  • a connecting portion (corner portion) between the chamfered portion on the piston top and the piston cylindrical surface, a top side chamfered portion or recess of the cylinder bore, and a cylinder bore cylindrical surface.
  • the connecting portion is basically set to a positional relationship in which the piston reciprocates as the piston reciprocates. Therefore, especially when high pressure acts on the piston or when the piston is reciprocated with the piston tilted, a high surface pressure may be applied locally to the coating surface of the piston, and the coating may peel off from this portion. It was easy.
  • the positional relationship can be set with respect to the axial direction or the circumferential direction of the cylinder bore, or with respect to both the axial direction and the circumferential direction.
  • the axial direction of the cylinder bore for example, at the position where the piston is at the top dead center, the connection force between the chamfered portion on the piston top side and the piston cylindrical surface, and the connection between the top side chamfered portion of the cylinder bore and the cylinder bore cylindrical surface It can comprise so that it may be located in the bottom dead center side rather than a part.
  • the connecting portion between the chamfered portion on the piston top side and the piston cylindrical surface is provided with a recess and a cylinder bore cylinder provided on the top side of the cylinder bore to regulate the stroke of the intake valve.
  • the two connecting portions do not come into a position where they are in sliding contact with each other in the axial direction of the cylinder bore. That is, even if the piston reaches top dead center, the chamfered portion on the piston top side and the piston cylinder The connection part with the surface does not reach the connection part between the top side chamfered part of the cylinder bore and the cylinder bore cylindrical surface, or the connection part between the recess and the cylinder bore cylindrical surface. What happens is that the starting point of the coating peeling due to the sliding contact between the corners does not occur, and the coating peeling is surely prevented.
  • the connecting portion between the chamfered portion on the piston top side and the piston cylindrical surface is connected to the cylinder bore by the inclination of the piston.
  • Cylindrical bore circumferential position that is in strong sliding contact with the cylinder bore (for example, in the case of a swash plate compressor, if it has a piston with a bridge portion that straddles the outer periphery of the swash plate, the cylinder bore circumferential position in the same direction as the bridge portion) Is provided with a recess formed on the top side of the cylinder bore to restrict the stroke of the intake valve at a circumferential position approximately opposite to the axial center of the cylinder bore.
  • a connecting portion of the cylindrical surface, a recess of the cylinder bore, and a connecting portion of the cylinder bore cylindrical surface It can be configured to be set in a positional relationship not in sliding contact with one another by streams Aransu set between the piston and the cylinder bore.
  • the cylinder bore circumferential position where the connection portion between the chamfered portion on the piston top side and the piston cylindrical surface strongly contacts the cylinder bore due to the tilt of the piston is the cylinder bore circumferential position.
  • connection portion between the passage and the cylinder bore cylindrical surface is set between the piston and the cylinder bore!
  • a part of the inner peripheral surface of the compressed fluid passage may be formed at the same position as the cylinder bore forming surface, and in this case, the inner periphery of the compressed fluid passage having different curvatures may be used.
  • a step is formed at a site where the surface and the cylinder bore forming surface are separated from each other!
  • the two connecting portions are prevented from sliding against each other in the circumferential direction of the cylinder bore, and a clearance exists between the two connecting portions due to the inclination of the piston. Therefore, at this circumferential position, the connecting portion between the chamfered portion on the piston top side and the piston cylindrical surface is connected to the connecting portion between the recess on the cylinder bore side and the cylinder bore cylindrical surface, or the passage installation portion of the fluid to be compressed. There is no sliding contact with the step that may be formed, and the starting point of the coating peeling due to the sliding contact between the corner portions does not occur, and the coating peeling is surely prevented.
  • the structure of the compressor according to the present invention is suitable for a compressor for a vehicle air conditioner that requires high durability.
  • the compressed fluid is a carbon dioxide refrigerant. In this case, it is suitable.
  • the type of the compressor is not particularly limited, and the present invention can be applied to any compressor having a piston and a cylinder bore. The invention's effect
  • the connecting portion between the piston top side chamfered portion and the cylindrical surface, and the chamfered portion of the cylinder bore and the connecting portion between the recess and the cylinder bore cylindrical surface are slid. Since there is no contact, coating peeling can be reliably prevented. In addition, since the piston itself can be manufactured by the same process as before, it is possible to improve the durability of the piston and thus the compressor at low cost.
  • the durability can be improved at a low cost. Furthermore, there is no need to increase the piston fitting length (in the axial direction) or decrease the swash plate inclination angle (increase in radial direction). An increase in size of the compressor can be prevented while preventing peeling.
  • FIG. 1 is a longitudinal sectional view of a conventional compressor.
  • FIG. 2 is a schematic cross-sectional view of the compressor in FIG. 1 as viewed from the cylinder head side.
  • FIG. 3 is an enlarged partial sectional view of the compressor of FIG.
  • FIG. 4 is a partial cross-sectional view of the compressor according to Embodiment 1 of the present invention.
  • FIG. 5 is a longitudinal sectional view of a compressor according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic cross-sectional view of the compressor of FIG. 5 as viewed from the cylinder head side.
  • FIG. 7 is an enlarged partial cross-sectional view of the compressor of FIG.
  • FIG. 8 is an enlarged partial cross-sectional view showing another part of the compressor of FIG.
  • FIG. 1 illustrates the case of a swash plate compressor.
  • 1 indicates the entire swash plate compressor.
  • the compressor 1 is integrated with the drive shaft 2 so that the tilt angle can be varied by the drive shaft 2 via the rotor 3 and the hinge mechanism 4. It has a swash plate 5 that is rotated.
  • Each piston 6 is inserted into a corresponding cylinder bore 8 formed in the cylinder block 7 so as to be reciprocally movable, and the rotational movement of the swash plate 5 is slidably contacted with the swash plate 5.
  • a fluid to be compressed for example, carbon dioxide refrigerant
  • Compressed fluid for example, high-pressure compressed gas
  • a suction valve 17 is provided on the cylinder bore 8 side of the suction hole 14, and a recess 18 is formed on the top side (piston top dead center side) of the cylinder bore 8 to restrict the stroke of the suction valve 17.
  • a discharge valve 19 is provided on the discharge chamber 16 side of the discharge hole 15, and the stroke of the discharge valve 19 is regulated by a discharge valve retainer 20.
  • the piston 6 is provided with a plurality of piston rings 21. The arrangement of each part viewed from the cylinder head 11 side of the compressor 1 is as shown in FIG.
  • a chamfered portion 22 is formed on the top side of the piston 6, and a connecting portion 24 is formed between the chamfered portion 22 and the piston cylindrical surface 23.
  • a chamfered portion 25 is also formed on the top side (piston top dead center side) of the cylinder bore 8, and a connecting portion 27 is formed between the chamfered portion 25 and the cylinder bore cylindrical surface 26. Further, a connecting portion 28 between the recess 18 and the cylinder bore cylindrical surface 26 is formed.
  • FIG. 4 shows a configuration according to Embodiment 1 of the present invention.
  • the piston is inserted into the cylinder bore so as to be reciprocally movable! /,
  • the connection between the chamfered portion on the piston top side and the piston cylindrical surface in the axial direction and / or circumferential direction of the cylinder bore of the compression mechanism. 4 and the top side chamfer of the cylinder bore or the connection portion between the recess and the cylinder bore cylindrical surface are set in a positional relationship in which they do not slide on each other.
  • the connecting part 34 to 33 is a piston more than the connecting part 28 of the top side chamfer 25 or recess 18 of the cylinder bore 8 and the connecting part 27 and 28 of the cylinder bore cylindrical surface 26, in particular the recess 18 and the cylindrical bore cylindrical surface 26. Because it is provided on the bottom dead center side, even if the piston 31 is reciprocated to its top dead center, the edges of these connection parts 34 and 28 do not slide against each other. Is prevented. By preventing the coating from peeling off, the durability of the piston 31, and thus the compressor, is improved.
  • the piston 31 The present invention can be implemented simply by forming the chamfered portion 32 on the top side of the shaft longer in the axial direction, and the piston can be manufactured by substantially the same process as the conventional one, making the present invention extremely inexpensive. It can be implemented.
  • the present invention can be implemented at low cost from the viewpoint of preventing peeling without strengthening the coating agent or lubricating oil. Furthermore, since it is not necessary to substantially change the size of the piston, it is possible to prevent the coating from peeling off and to increase the size of the compressor.
  • FIGS. 5 and 6 show the structure of the compressor according to Embodiment 2 of the present invention.
  • the avoidance of sliding contact between the connecting portions is mainly arranged in the circumferential direction of the cylinder bore. It has been achieved.
  • a suction chamber 43 is formed in the center of the cylinder head 42 of the compressor 41, and a discharge chamber 44 is formed on the outer peripheral side.
  • a suction hole 46, a discharge hole 47, and a suction valve 48, a discharge valve 49, a recess 50, and a discharge valve retainer 51 are arranged in the valve plate 45 so as to correspond to the suction hole 46 and the discharge hole 47. .
  • the position of the recess 50 is set at a position opposite to the axial center of the cylinder bore as compared with the conventional configuration shown in FIGS.
  • Parts having the same configurations as those in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2, and description thereof is omitted.
  • the connecting portion 64 is provided closer to the piston bottom dead center than the connecting portion 27 between the top side chamfer 25 of the cylinder bore 8 and the cylinder bore cylindrical surface 26. Therefore, even if the piston 61 is reciprocated to the top dead center, the peeling of the coating on the piston 61 side that prevents the edges of these connecting portions 64 and 27 from slidingly contacting each other is appropriately prevented. Further, as shown in FIG. 7, as shown in FIG. 7, at the top dead center position of the piston 61, the chamfered portion 62 on the top side of the piston 61 and the piston cylindrical surface 63 The connecting portion 64 is provided closer to the piston bottom dead center than the connecting portion 27 between the top side chamfer 25 of the cylinder bore 8 and the cylinder bore cylindrical surface 26. Therefore, even if the piston 61 is reciprocated to the top dead center, the peeling of the coating on the piston 61 side that prevents the edges of these connecting portions 64 and 27 from slidingly contacting each other is appropriately prevented. Further, as shown in FIG.
  • the recess 50 is provided on the side opposite to the direction in contact with the cylinder bore 8 when the piston 61 is tilted by the side force, so that the recess 50 is provided between the piston 61 and the cylinder bore 8. Because of this clearance, the connecting portion 64 on the piston 61 side does not slide on the connecting portion 65 between the recess 50 and the cylinder bore cylindrical surface 26 even on this side. Therefore, peeling of the coating on the piston 61 side due to sliding contact between the edges of these connection portions 64 and 65 is also appropriately prevented. By preventing the coating from peeling off, the durability of the piston 61 and thus the compressor is improved. Industrial applicability
  • the structure of the compressor according to the present invention can be applied to any compressor having a piston and a cylinder bore, and is a compressor for a vehicle air conditioner that requires particularly high durability, particularly, a dioxide used at high pressure. This is suitable for a compressor using a carbon refrigerant.

Abstract

La présente invention concerne un compresseur caractérisé en ce que la partie de connexion entre une partie cannelée sur le côté de la partie supérieure du piston et une surface cylindrique du piston et la partie de connexion entre une partie cannelée ou un renfoncement sur le côté de la partie supérieure de l'alésage du piston et une surface cylindrique de l'alésage du cylindre sont configurées dans une relation de position telle qu'elles n'entrent pas en contact de manière coulissante l'une avec l'autre suivant les directions axiale et/ou circonférentielle d'un alésage de cylindre. Par conséquent, on peut empêcher à moindre coût qu'un revêtement se détache sans augmenter la taille du compresseur, la durée de vie du compresseur pouvant de ce fait être augmentée.
PCT/JP2007/071896 2006-11-15 2007-11-12 Compresseur WO2008059784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-309134 2006-11-15
JP2006309134A JP2008121633A (ja) 2006-11-15 2006-11-15 圧縮機

Publications (1)

Publication Number Publication Date
WO2008059784A1 true WO2008059784A1 (fr) 2008-05-22

Family

ID=39401592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/071896 WO2008059784A1 (fr) 2006-11-15 2007-11-12 Compresseur

Country Status (2)

Country Link
JP (1) JP2008121633A (fr)
WO (1) WO2008059784A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06323249A (ja) * 1993-03-16 1994-11-22 Toyota Autom Loom Works Ltd 斜板式可変容量圧縮機
JPH074355A (ja) * 1993-06-17 1995-01-10 Hitachi Ltd 密閉形圧縮機
JP2000170658A (ja) * 1998-12-09 2000-06-20 Toyota Autom Loom Works Ltd 圧縮機
JP2001159392A (ja) * 1999-09-24 2001-06-12 Toyota Autom Loom Works Ltd 斜板式圧縮機用の片頭ピストン
JP2001248550A (ja) * 2000-03-07 2001-09-14 Zexel Valeo Climate Control Corp 可変容量型圧縮機
JP2002349440A (ja) * 2001-05-30 2002-12-04 Zexel Valeo Climate Control Corp 往復式冷媒圧縮機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0421026Y2 (fr) * 1987-04-17 1992-05-13
KR970001968A (ko) * 1995-06-13 1997-01-24 밀폐형 압축기의 슬라이더
JPH09177670A (ja) * 1995-12-27 1997-07-11 Toyota Autom Loom Works Ltd ピストン式圧縮機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06323249A (ja) * 1993-03-16 1994-11-22 Toyota Autom Loom Works Ltd 斜板式可変容量圧縮機
JPH074355A (ja) * 1993-06-17 1995-01-10 Hitachi Ltd 密閉形圧縮機
JP2000170658A (ja) * 1998-12-09 2000-06-20 Toyota Autom Loom Works Ltd 圧縮機
JP2001159392A (ja) * 1999-09-24 2001-06-12 Toyota Autom Loom Works Ltd 斜板式圧縮機用の片頭ピストン
JP2001248550A (ja) * 2000-03-07 2001-09-14 Zexel Valeo Climate Control Corp 可変容量型圧縮機
JP2002349440A (ja) * 2001-05-30 2002-12-04 Zexel Valeo Climate Control Corp 往復式冷媒圧縮機

Also Published As

Publication number Publication date
JP2008121633A (ja) 2008-05-29

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