WO2012088571A1 - Piston assembly for alernative compressor - Google Patents

Piston assembly for alernative compressor Download PDF

Info

Publication number
WO2012088571A1
WO2012088571A1 PCT/BR2011/000460 BR2011000460W WO2012088571A1 WO 2012088571 A1 WO2012088571 A1 WO 2012088571A1 BR 2011000460 W BR2011000460 W BR 2011000460W WO 2012088571 A1 WO2012088571 A1 WO 2012088571A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cylinder
cylinder assembly
amorphous carbon
dlc
Prior art date
Application number
PCT/BR2011/000460
Other languages
French (fr)
Inventor
Márcio SILVÉRIO
Original Assignee
Whirpool S.A.
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 Whirpool S.A. filed Critical Whirpool S.A.
Priority to SG2013050299A priority Critical patent/SG191408A1/en
Priority to CN201180064821.6A priority patent/CN103298972B/en
Priority to EP11854223.2A priority patent/EP2659025A1/en
Priority to KR1020137018894A priority patent/KR20140067961A/en
Priority to US13/976,767 priority patent/US20140020555A1/en
Priority to JP2013546527A priority patent/JP2014502691A/en
Publication of WO2012088571A1 publication Critical patent/WO2012088571A1/en

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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26—Deposition of carbon only
    • C23C16/27—Diamond only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • 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
    • F04B39/0005—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
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • 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
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • 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
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0808—Carbon, e.g. graphite
    • 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
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/083—Nitrides
    • 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
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0856—Sulfides
    • 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 refers to a piston/cylinder assembly for alternative compressors, and, more specifically, to a piston/cylinder assembly for linear compressors.
  • a compressor The function of a compressor is to elevate the pressure of determined volume of fluid to a pressure required to effect a refrigeration cycle.
  • the thus called alternative compressors, where a piston reciprocately slides inside a cylinder to carry out compression of gases, are known from the art.
  • a contact between a reciprocating piston and a cylinder can generate high mechanical losses, and may cause damage and premature failure in a compressor.
  • Such a contact between parts may increase noise, operational temperature, compressor vibration, and loss of effectiveness, thus also contributing to increase in equipment energy power consumption.
  • an object of the present invention relates to a piston/cylinder assembly for an alternative compressor, which provides lesser friction between the piston and cylinder, thus preventing premature wear of the parts.
  • the present invention achieves the objects mentioned above by providing a piston/cylinder assembly for an alternative compressor where said piston performs a reciprocating movement inside said cylinder, where piston surface and cylinder surface comprise a surface roughness with surface roughness parameter Rpk of less than about 60 and a surface roughness parameter Rvk of less than 100 nm; and the piston surface receives a coating comprising at least one support layer and at least one DLC layer (3).
  • the cylinder material comprises stainless steel
  • the support layer material is selected from nitrides and sulfides
  • the DLC layer material is selected from non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, and hydrogenated tetragonal amorphous carbon.
  • Said DLC layer may further comprise metal and non-metal alloy elements.
  • Figure 1 illustrates a schematic view of the coating of the piston/cylinder assembly in accordance with a preferred embodiment of the present invention.
  • Figure 2 illustrates a comparative graphic representation between the present invention and the solution of the state of the art.
  • Figure 3 illustrates a schematic representation of the coated surfaces of the piston/cylinder assembly in accordance with the preferred embodiment of the present invention.
  • the present invention provides for coating the outer surface of the piston with thin films of DLC in association with a base coating that increases the mechanical strength of the DLC coating applied to the surface.
  • the present invention comprises a piston 1 (only a portion of its outer surface is illustrated) which receives a coating preferably composed of a mechanical support layer 2 and a DLC layer 3.
  • the support layer 2 and support layer 3 generate a coating having a thickness of approximately 3-10 microns.
  • Said support layer 2 can comprise a single or multiple elements disposed in the following forms: gradually variable chemical composition, constant chemical composition, monolayer or multilayer.
  • composition of support layer 2 can vary in accordance with mechanical tensiles of a specific design of a piston/cylinder assembly, wherein said layer can comprise nitrides (CrN, FeN, TiN, ⁇ , CAITiN, etc.), sulfides (MoS 2 , and variations, WS 2 , and variations, etc.; and other coatings having intermediate hardness between the substrate and DLC in order to give mechanical support to high loads acting on the piston.
  • nitrides CrN, FeN, TiN, ⁇ , CAITiN, etc.
  • MoS 2 sulfides
  • WS 2 sulfides
  • DLC 3 layer same is composed of a carbon-based coating having variable proportions of hydrogen, and it may also contain the following variations: a- C:H (Non-Hydrogenated Amorphous Carbon); a-C:H (Hydrogenated Amorphous Carbon); ta- C (Non-Hydrogenate Tetragonal Amorphous Carbon); ta-C:H (Hydrogenated Tetragonal Amorphous Carbon).
  • addition of alloy elements can also be used to obtain specific properties for each application, wherein a layer with addition of alloy elements is designated Me-DCL, wherein Me refers to the (metal or non-metal) added elements.
  • the disposition of layer 3 can also comprise variations concerning the proportion of alloy elements, and can be, for example: a gradually variable chemical composition, a constant chemical composition, a monocompound, or DLC variations disposed in intercalated form.
  • DLC layer is carried out after preparing the piston surface that will receive said layer.
  • This preparation involves a surface finishing process so as to obtain a surface roughness with parameters Rpk ⁇ 60 nm and Rvk ⁇ 100 nm obtained by topographic measurement of the surfaces.
  • the cylinder surface is prepared so as to obtain a cylinder surface with surface roughness having parameters Rpk ⁇ 60 nm and Rvk ⁇ 100 nm achieved by topographical measurement of the surfaces.
  • Figure 2 schematically shows the wear of DLC layer on a surface without the roughness specified above ( Figures a) and b)) and with the roughness specified above ( Figures c) and d)).
  • DLC layers undergoes a premature wear due to the concentration of contact stresses in the surface harsh peaks (that is, they end up forming punctual support areas on the layer). Such a premature wear then leaves the piston substrate exposed.
  • said piston/cylinder assembly is made of stainless steel.
  • the use of a stainless steel cylinder allows for a tribolayer formation uniformly distributed at both contact interfaces due to the relative movement between the parts.
  • Said tribolayer is formed due to the elimination (by mild wear) of harsh peaks from the stainless steel of the cylinder and of DLC as well as residues of materials used in the remaining parts of the compressor and the atmosphere application thereof.
  • the formation of a longer lasting DLC coating by fabricating one of the parts of the piston/cylinder assembly ensures the formation of a tribolayer, which is essential for the functioning of the tribologic pair, allowing for the piston/cylinder assembly to function without significant wear, low friction and suitable durability.

Abstract

The present invention refers to a piston/cylinder assembly for alternative compressor, wherein the piston performs a reciprocating movement inside the cylinder, wherein piston surface (1 ) and cylinder surface have a surface roughness parameter Rpk of less than about 60 nm and a surface roughness parameter Rvk of less than 100 nm; and said piston surface (1 ) receives a coating comprising at least a support layer 2 and at least a DLC layer (3).

Description

"PISTON ASSEMBLY FOR ALERNATIVE COMPRESSOR"
Field of the Invention
The" present invention refers to a piston/cylinder assembly for alternative compressors, and, more specifically, to a piston/cylinder assembly for linear compressors.
Background of the Invention
The function of a compressor is to elevate the pressure of determined volume of fluid to a pressure required to effect a refrigeration cycle. The thus called alternative compressors, where a piston reciprocately slides inside a cylinder to carry out compression of gases, are known from the art.
A contact between a reciprocating piston and a cylinder can generate high mechanical losses, and may cause damage and premature failure in a compressor.
Furthermore, such a contact between parts may increase noise, operational temperature, compressor vibration, and loss of effectiveness, thus also contributing to increase in equipment energy power consumption.
In some types of compressors, a lubricating oil between the moving parts is predicted; nevertheless, in some applications to linear compressors the presence of oil is deleterious.
In an attempt to solve this problem related to a piston/cylinder friction without using lubricating oil, some technical solutions have been developed for using special coatings in such parts.
This is, for example, the case of solutions disclosed in US Patent 6,641 ,337 and JP 2001107860, which refer to application of DLC (Diamond-like Carbon) to moving parts of a compressor.
However, even these already known solutions do not entirely solve the problem of stress contact and consequent wear between parts, since the concentration of contact stresses over harsh peaks of DLC ends up causing premature wear of the coating.
Objects of the Invention
Therefore, an object of the present invention relates to a piston/cylinder assembly for an alternative compressor, which provides lesser friction between the piston and cylinder, thus preventing premature wear of the parts.
Summary of the Invention
The present invention achieves the objects mentioned above by providing a piston/cylinder assembly for an alternative compressor where said piston performs a reciprocating movement inside said cylinder, where piston surface and cylinder surface comprise a surface roughness with surface roughness parameter Rpk of less than about 60 and a surface roughness parameter Rvk of less than 100 nm; and the piston surface receives a coating comprising at least one support layer and at least one DLC layer (3). In a preferred embodiment of the present invention, the cylinder material comprises stainless steel, the support layer material is selected from nitrides and sulfides, and the DLC layer material is selected from non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, and hydrogenated tetragonal amorphous carbon. Said DLC layer may further comprise metal and non-metal alloy elements.
Brief Description of the Drawings
Figure 1 illustrates a schematic view of the coating of the piston/cylinder assembly in accordance with a preferred embodiment of the present invention.
Figure 2 illustrates a comparative graphic representation between the present invention and the solution of the state of the art.
Figure 3 illustrates a schematic representation of the coated surfaces of the piston/cylinder assembly in accordance with the preferred embodiment of the present invention.
Detailed Description of the Invention
Next, the present invention will be described in more details based on execution examples represented by the appended drawings.
In order to ensure the correct functioning of the piston/cylinder assembly without affecting the effectiveness in function of wear and in the absence of lubrication by lubricating oil, the present invention provides for coating the outer surface of the piston with thin films of DLC in association with a base coating that increases the mechanical strength of the DLC coating applied to the surface.
Thus, as can be seen from Figure 1 , the present invention comprises a piston 1 (only a portion of its outer surface is illustrated) which receives a coating preferably composed of a mechanical support layer 2 and a DLC layer 3. In the preferred embodiment of the present invention, the support layer 2 and support layer 3 generate a coating having a thickness of approximately 3-10 microns.
Said support layer 2 can comprise a single or multiple elements disposed in the following forms: gradually variable chemical composition, constant chemical composition, monolayer or multilayer.
In addition, the composition of support layer 2 can vary in accordance with mechanical tensiles of a specific design of a piston/cylinder assembly, wherein said layer can comprise nitrides (CrN, FeN, TiN, ΑΙΤΊΝ, CAITiN, etc.), sulfides (MoS2, and variations, WS2, and variations, etc.; and other coatings having intermediate hardness between the substrate and DLC in order to give mechanical support to high loads acting on the piston.
With regard to the DLC 3 layer, same is composed of a carbon-based coating having variable proportions of hydrogen, and it may also contain the following variations: a- C:H (Non-Hydrogenated Amorphous Carbon); a-C:H (Hydrogenated Amorphous Carbon); ta- C (Non-Hydrogenate Tetragonal Amorphous Carbon); ta-C:H (Hydrogenated Tetragonal Amorphous Carbon). Besides these variations, addition of alloy elements can also be used to obtain specific properties for each application, wherein a layer with addition of alloy elements is designated Me-DCL, wherein Me refers to the (metal or non-metal) added elements.
The disposition of layer 3 can also comprise variations concerning the proportion of alloy elements, and can be, for example: a gradually variable chemical composition, a constant chemical composition, a monocompound, or DLC variations disposed in intercalated form.
Application of the DLC layer is carried out after preparing the piston surface that will receive said layer. This preparation involves a surface finishing process so as to obtain a surface roughness with parameters Rpk < 60 nm and Rvk< 100 nm obtained by topographic measurement of the surfaces.
To ensure the reduction of the friction on the piston/cylinder assembly, the cylinder surface is prepared so as to obtain a cylinder surface with surface roughness having parameters Rpk< 60 nm and Rvk< 100 nm achieved by topographical measurement of the surfaces.
In this sense, Figure 2 schematically shows the wear of DLC layer on a surface without the roughness specified above (Figures a) and b)) and with the roughness specified above (Figures c) and d)).
As can be seen from Figures a) and b), under high roughness condition, DLC layers undergoes a premature wear due to the concentration of contact stresses in the surface harsh peaks (that is, they end up forming punctual support areas on the layer). Such a premature wear then leaves the piston substrate exposed.
Nevertheless, when the roughness is within the parameters proposed by the present invention - such as shown in Figures c) and d), a gradual and mild wear on the DLC layer occurs due to the formation of a greater area of support between the surfaces resulting in the reduction of contact stresses.
In the preferred embodiment of the present invention, said piston/cylinder assembly is made of stainless steel.
As can be seen from Figure 3, the use of a stainless steel cylinder allows for a tribolayer formation uniformly distributed at both contact interfaces due to the relative movement between the parts. Said tribolayer is formed due to the elimination (by mild wear) of harsh peaks from the stainless steel of the cylinder and of DLC as well as residues of materials used in the remaining parts of the compressor and the atmosphere application thereof.
Therefore, the formation of a longer lasting DLC coating by fabricating one of the parts of the piston/cylinder assembly ensures the formation of a tribolayer, which is essential for the functioning of the tribologic pair, allowing for the piston/cylinder assembly to function without significant wear, low friction and suitable durability.
It should be construed that this description based on the figures above only refers to one of the possible embodiments of the object of the present invention, wherein the real scope of the object to be protected is defined by the appended claims.

Claims

1 . Piston/cylinder assembly for an alternative compressor wherein the piston performs a reciprocating movement inside the cylinder, characterized in that:
piston surface (1 ) and cylinder surface have a surface roughness parameter Rpk of less than about 60 nm and a surface roughness parameter Rvk of less than 100 nm;
said piston surface (1 ) receives a coating comprising at least a support layer 2 and at least a DLC layer (3).
2. Piston/cylinder assembly, in accordance with claim 1 , characterized in that the cylinder material is stainless steel.
3. Piston/cylinder assembly, in accordance with claim 1 or 2, characterized in that the material of said support layer (2) is selected from nitrides and sulfides.
4. Piston/cylinder assembly, in accordance with claim 1 , 2, or 3, characterized in that the material of said DLC layer (3) is selected from non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, and hydrogenated tetragonal amorphous carbon, or a combination thereof.
5. Piston/cylinder assembly, in accordance with claim 4, characterized in that said DLC layer (3) further comprises metal or non-metal alloy elements.
PCT/BR2011/000460 2010-12-27 2011-12-08 Piston assembly for alernative compressor WO2012088571A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SG2013050299A SG191408A1 (en) 2010-12-27 2011-12-08 Piston assembly for alernative compressor
CN201180064821.6A CN103298972B (en) 2010-12-27 2011-12-08 Piston component for reciprocating compressor
EP11854223.2A EP2659025A1 (en) 2010-12-27 2011-12-08 Piston assembly for alernative compressor
KR1020137018894A KR20140067961A (en) 2010-12-27 2011-12-08 Piston assembly for alernative compressor
US13/976,767 US20140020555A1 (en) 2010-12-27 2011-12-08 Piston assembly for alternative compressor
JP2013546527A JP2014502691A (en) 2010-12-27 2011-12-08 Piston assembly for alternative compressor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI1009955-7 2010-12-27
BRPI1009955-7A BRPI1009955A2 (en) 2010-12-27 2010-12-27 piston - reciprocating compressor cylinder assembly

Publications (1)

Publication Number Publication Date
WO2012088571A1 true WO2012088571A1 (en) 2012-07-05

Family

ID=46382111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2011/000460 WO2012088571A1 (en) 2010-12-27 2011-12-08 Piston assembly for alernative compressor

Country Status (9)

Country Link
EP (1) EP2659025A1 (en)
JP (1) JP2014502691A (en)
KR (1) KR20140067961A (en)
CN (1) CN103298972B (en)
AR (1) AR084603A1 (en)
BR (1) BRPI1009955A2 (en)
SG (1) SG191408A1 (en)
TW (1) TWI461605B (en)
WO (1) WO2012088571A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2818713A3 (en) * 2013-06-28 2015-10-28 LG Electronics, Inc. Linear compressor
US9677553B2 (en) 2013-06-28 2017-06-13 Lg Electronics Inc. Linear compressor
US9695811B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9714648B2 (en) 2013-06-28 2017-07-25 Lg Electronics Inc. Linear compressor
US9726164B2 (en) 2013-06-28 2017-08-08 Lg Electronics Inc. Linear compressor
WO2018018149A1 (en) * 2016-07-29 2018-02-01 Industries Mailhot Inc. A cylinder piston rod and method of fabrication thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09124394A (en) * 1995-10-31 1997-05-13 Kyocera Corp Wear-resistant member
US6491987B2 (en) * 1999-05-03 2002-12-10 Guardian Indusries Corp. Process for depositing DLC inclusive coating with surface roughness on substrate
EP1144719B1 (en) * 1998-11-02 2003-07-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Polycrystalline diamond layer with optimized surface properties
US6656591B2 (en) * 2000-12-11 2003-12-02 Osg Corporation Diamond-coated body including interface layer interposed between substrate and diamond coating, and method of manufacturing the same

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW394800B (en) * 1995-01-17 2000-06-21 Qqc Inc Surface modification and/or fabrication techniques
JP3914657B2 (en) * 1999-05-11 2007-05-16 カヤバ工業株式会社 Piston surface treatment method
JP2001107860A (en) * 1999-10-07 2001-04-17 Matsushita Refrig Co Ltd Sliding member
JP2001234858A (en) * 1999-12-13 2001-08-31 Sumitomo Heavy Ind Ltd Gas compressor
JP2003013958A (en) * 2001-06-26 2003-01-15 Nissan Motor Co Ltd Slide bearing and manufacturing method
SE526481C2 (en) * 2003-01-13 2005-09-20 Sandvik Intellectual Property Surface hardened stainless steel with improved abrasion resistance and low static friction
EP1479946B1 (en) * 2003-05-23 2012-12-19 Nissan Motor Co., Ltd. Piston for internal combustion engine
CN100587045C (en) * 2003-08-06 2010-02-03 日产自动车株式会社 Low-friction sliding mechanism, low-friction agent composition and method of reducing friction
JP4539205B2 (en) * 2003-08-21 2010-09-08 日産自動車株式会社 Refrigerant compressor
JP4076169B2 (en) * 2004-07-06 2008-04-16 株式会社豊田中央研究所 Piston ring, piston, cylinder, piston pin with amorphous hard carbon film
US20080000348A1 (en) * 2004-12-23 2008-01-03 Bsh Bosch Und Siemens Hausgerate Gmbh Linear Compressor
CN101365824B (en) * 2005-08-18 2010-09-01 贝卡尔特股份有限公司 Substrate coated with a layered structure comprising a tetrahedral carbon coating
JP4683288B2 (en) * 2005-12-28 2011-05-18 株式会社豊田自動織機 Sliding member
JP5030439B2 (en) * 2006-02-28 2012-09-19 株式会社リケン Sliding member
US20090286352A1 (en) * 2006-04-18 2009-11-19 Chien-Min Sung Diamond Bodies Grown on SIC Substrates and Associated Methods
JP4954644B2 (en) * 2006-08-31 2012-06-20 日本ピストンリング株式会社 Combination of cylinder liner and piston ring
TW200927294A (en) * 2007-09-14 2009-07-01 Showa Denko Kk Apparatus and method for coating double-sided substrate
DE112008003230T5 (en) * 2007-11-30 2010-10-07 Nippon Piston Ring Co., Ltd. Steel products for piston rings and piston rings
DE102008011921A1 (en) * 2008-02-29 2009-09-10 Ks Kolbenschmidt Gmbh Coating of components of an internal combustion engine to reduce friction, wear and adhesion tendency
JP2010025075A (en) * 2008-07-24 2010-02-04 Panasonic Corp Sliding member and hermetic compressor
DE102009046281B3 (en) * 2009-11-02 2010-11-25 Federal-Mogul Burscheid Gmbh Sliding element, in particular piston ring, and combination of a sliding element with a running partner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09124394A (en) * 1995-10-31 1997-05-13 Kyocera Corp Wear-resistant member
EP1144719B1 (en) * 1998-11-02 2003-07-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Polycrystalline diamond layer with optimized surface properties
US6491987B2 (en) * 1999-05-03 2002-12-10 Guardian Indusries Corp. Process for depositing DLC inclusive coating with surface roughness on substrate
US6656591B2 (en) * 2000-12-11 2003-12-02 Osg Corporation Diamond-coated body including interface layer interposed between substrate and diamond coating, and method of manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SILVERIO, M. BINDER ET AL.: "J. D. B. Estudo Tribolôgico de Revestimentos de DLC com Gases Refrigerantes HFC I 34A e HC 600A.", REVISTA TECNOLOGIA EM METALURGIA, MATERIAIS E MINERAÇÂO, vol. 8, no. 1, January 2011 (2011-01-01), pages 64 - 72, XP055137796 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2818713A3 (en) * 2013-06-28 2015-10-28 LG Electronics, Inc. Linear compressor
US9677553B2 (en) 2013-06-28 2017-06-13 Lg Electronics Inc. Linear compressor
US9695811B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9714648B2 (en) 2013-06-28 2017-07-25 Lg Electronics Inc. Linear compressor
US9726164B2 (en) 2013-06-28 2017-08-08 Lg Electronics Inc. Linear compressor
US10634127B2 (en) 2013-06-28 2020-04-28 Lg Electronics Inc. Linear compressor
WO2018018149A1 (en) * 2016-07-29 2018-02-01 Industries Mailhot Inc. A cylinder piston rod and method of fabrication thereof
US11867205B2 (en) 2016-07-29 2024-01-09 Industries Malhot Inc. Cylinder piston rod and method of fabrication thereof

Also Published As

Publication number Publication date
TW201235566A (en) 2012-09-01
CN103298972A (en) 2013-09-11
EP2659025A1 (en) 2013-11-06
KR20140067961A (en) 2014-06-05
TWI461605B (en) 2014-11-21
BRPI1009955A2 (en) 2013-06-11
JP2014502691A (en) 2014-02-03
AR084603A1 (en) 2013-05-29
CN103298972B (en) 2016-12-21
SG191408A1 (en) 2013-08-30

Similar Documents

Publication Publication Date Title
EP2659025A1 (en) Piston assembly for alernative compressor
US8033550B2 (en) Piston ring having hard multi-layer coating
Weston et al. Friction and sliding wear behaviour of electrodeposited cobalt and cobalt–tungsten alloy coatings for replacement of electrodeposited chromium
Oksanen et al. Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures
KR101801400B1 (en) Sliding Element with DLC Coating
KR101155845B1 (en) Sliding member in compressor
BR112012010336B1 (en) sliding element and combination of a sliding element
CN103620085A (en) Method for coating at least the inner face of a piston ring and piston ring
GB2398527A (en) Sliding member
JP4359979B2 (en) Covered sliding member
KR20150109345A (en) Sliding Element, in Particular a Piston Ring, Having a Coating
Vila et al. Ultra-high performance of DLC-coated Si3N4 rings for mechanical seals
CN107035564B (en) Sliding element
CN113529016B (en) TiSiCN nano coating, preparation method thereof and piston
JP4269726B2 (en) Sliding member, crankshaft, and variable compression ratio engine
US20140020555A1 (en) Piston assembly for alternative compressor
CN101885250A (en) Self-lubricating metallic material
Ando et al. Friction and wear properties of nanostripe-inducing structures in vacuum environment
JP2016145406A (en) Nano composite solid lubricating film
Wang et al. Tribological performances of non-hydrogenated amorphous carbon coupling with different coating counterparts in ambient air and water
Zeiler et al. Tribological performance of mechanically lapped chemical vapor deposited diamond coatings
CN113584431A (en) Mechanical element coated with an amorphous carbon layer for its slidability with respect to other less hard components
JP2000320674A (en) Low friction material and manufacture thereof
Al-Samarai et al. Tribological properties of DLC and GLC coating for automotive engine components application under lubrication
JP2018119172A (en) Method of producing paired slide members

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11854223

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2013546527

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2011854223

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20137018894

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 13976767

Country of ref document: US