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
English (en)
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 KR1020137018894A priority patent/KR20140067961A/ko
Priority to US13/976,767 priority patent/US20140020555A1/en
Priority to JP2013546527A priority patent/JP2014502691A/ja
Priority to EP11854223.2A priority patent/EP2659025A1/en
Priority to CN201180064821.6A priority patent/CN103298972B/zh
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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Chemical Vapour Deposition (AREA)
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
KR1020137018894A KR20140067961A (ko) 2010-12-27 2011-12-08 교호형 컴프레서를 위한 피스톤 어셈블리
US13/976,767 US20140020555A1 (en) 2010-12-27 2011-12-08 Piston assembly for alternative compressor
JP2013546527A JP2014502691A (ja) 2010-12-27 2011-12-08 オルターナティブ圧縮機用ピストンアセンブリ
EP11854223.2A EP2659025A1 (en) 2010-12-27 2011-12-08 Piston assembly for alernative compressor
CN201180064821.6A CN103298972B (zh) 2010-12-27 2011-12-08 用于往复式压缩机的活塞组件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI1009955-7A BRPI1009955A2 (pt) 2010-12-27 2010-12-27 conjunto pistço - cilindro para compressor alternativo
BRPI1009955-7 2010-12-27

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 (zh)
JP (1) JP2014502691A (zh)
KR (1) KR20140067961A (zh)
CN (1) CN103298972B (zh)
AR (1) AR084603A1 (zh)
BR (1) BRPI1009955A2 (zh)
SG (1) SG191408A1 (zh)
TW (1) TWI461605B (zh)
WO (1) WO2012088571A1 (zh)

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
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695811B2 (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

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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
US9695810B2 (en) 2013-06-28 2017-07-04 Lg Electronics Inc. Linear compressor
US9695811B2 (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
KR20140067961A (ko) 2014-06-05
BRPI1009955A2 (pt) 2013-06-11
CN103298972B (zh) 2016-12-21
TW201235566A (en) 2012-09-01
AR084603A1 (es) 2013-05-29
CN103298972A (zh) 2013-09-11
EP2659025A1 (en) 2013-11-06
TWI461605B (zh) 2014-11-21
JP2014502691A (ja) 2014-02-03
SG191408A1 (en) 2013-08-30

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