KR20140067961A - Piston assembly for alernative compressor - Google Patents

Piston assembly for alernative compressor Download PDF

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Publication number
KR20140067961A
KR20140067961A KR1020137018894A KR20137018894A KR20140067961A KR 20140067961 A KR20140067961 A KR 20140067961A KR 1020137018894 A KR1020137018894 A KR 1020137018894A KR 20137018894 A KR20137018894 A KR 20137018894A KR 20140067961 A KR20140067961 A KR 20140067961A
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South Korea
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piston
cylinder
layer
amorphous carbon
compressor
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KR1020137018894A
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Korean (ko)
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마르시오 실베리오
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월풀 에스.에이.
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    • 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
    • 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
    • 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

Abstract

본 발명은 교호형 컴프레서를 위한 피스톤/실린더 어셈블리에 관한 것이되, 피스톤은 실린더 내부에서 왕복 운동을 수행하고, 피스톤 표면(1) 및 실린더 표면은 약 60 ㎚보다 작은 표면 거칠기 파라미터(Rpk) 및 100 ㎚보다 작은 표면 거칠기 파라미터(Rvk)를 가지며; 상기 피스톤 표면(1)은 적어도 하나의 지지층(2) 및 적어도 하나의 DLC 층(3)을 포함하는 코팅을 수용한다.The invention relates to a piston / cylinder assembly for an alternating compressor, wherein the piston performs reciprocating motion within the cylinder, wherein the piston surface (1) and the cylinder surface have surface roughness parameters Rpk of less than about 60 nm and 100 A surface roughness parameter (Rvk) smaller than nm; The piston surface (1) receives a coating comprising at least one support layer (2) and at least one DLC layer (3).

Description

교호형 컴프레서를 위한 피스톤 어셈블리{PISTON ASSEMBLY FOR ALERNATIVE COMPRESSOR}PISTON ASSEMBLY FOR ALTERNATIVE COMPRESSOR < RTI ID = 0.0 >

본 발명은 교호형 컴프레서를 위한 피스톤/실린더 어셈블리에 관한 것이고, 더 상세하게는, 리니어 컴프레서를 위한 피스톤/실린더 어셈블리에 관한 것이다.The present invention relates to a piston / cylinder assembly for an alternating compressor, and more particularly to a piston / cylinder assembly for a linear compressor.

컴프레서(compressor)의 기능은 냉각 사이클을 야기하는 데에 요구되는 압력으로 소정의 유체 체적의 압력을 상승시키는 것이다. 따라서 피스톤이 실린더 내부에서 왕복으로 슬라이딩하여 기체의 압축을 수행하는, 소위 교호형 컴프레서가 기술분야로부터 알려진다.The function of the compressor is to raise the pressure of a given fluid volume to the pressure required to cause a cooling cycle. So-called alternating compressors are known in the art, whereby the piston slides reciprocally within the cylinder to effect compression of the gas.

왕복 피스톤과 실린더 사이의 접촉은 높은 기계적 손실을 발생시킬 수 있고, 컴프레서 안에서 손상 및 조기 파손을 야기할 수 있다. 또한, 부품들 사이의 이러한 접촉은 소음, 작동 온도, 컴프레서 진동 및 효과의 손실을 증가시킬 수 있고, 이에 따라 또한 장비 에너지 소비전력을 증가하는 것을 기여한다. Contact between the reciprocating piston and the cylinder can cause high mechanical losses and can cause damage and premature failure in the compressor. In addition, such contact between the components can increase noise, operating temperature, compressor vibration and loss of effectiveness, thereby also contributing to increased equipment energy consumption.

몇몇 형태의 컴프레서들에서, 운동 부품들 사이에서 윤활유는 예상된다; 그럼에도 불구하고, 리니어 컴프레서들에 대한 몇몇 어플리케이션들에서 오일의 존재는 유해하다.In some types of compressors, lubricant is expected between the moving parts; Nonetheless, the presence of oil in some applications for linear compressors is detrimental.

윤활유를 이용하지 않고 피스톤/실린더 마찰에 관한 이런 문제점을 해결하기 위한 시도에서, 몇몇 기술적 해결안은 이러한 부품들에 특별한 코팅을 이용하기 위하여 개발되어 왔다.In an attempt to solve this problem with piston / cylinder friction without using lubricating oil, several technical solutions have been developed for using special coatings on these parts.

예를 들어, 이는 컴프레서의 운동 부품들에 대한 DLC(다이아몬드상 카본; Diamond-like Carbon)의 도포와 관련 있는, 미국 특허 6,641,337호 및 일본 특허 2001107860호에서 개시된 해결안들의 경우이다. For example, this is the case with the solutions disclosed in U.S. Patent No. 6,641,337 and Japanese Patent No. 2001107860, which are related to the application of DLC (Diamond-like Carbon) to the moving parts of the compressor.

하지만, DLC의 거친 피크(harsh peak)를 가로지르는 접촉 응력의 집중이 결국 코팅의 조기 마모를 야기하게 되기 때문에, 이런 이미 알려진 해결안들은 부품들 사이의 응력 접촉 및 그 결과에 따른 마모의 문제점을 완전히 해결하지 못한다.However, since the concentration of the contact stress across the harsh peak of the DLC eventually leads to premature wear of the coating, these already known solutions have completely solved the problem of stress contact between the parts and the resulting wear. I can not solve it.

따라서, 본 발명의 목적은 피스톤(piston)과 실린더(cylinder) 사이에 더 적은 마찰을 제공하고 이에 따라 부품들의 조기 마모를 방지하는, 교호형 컴프레서(compressor)를 위한 피스톤/실린더 어셈블리(assembly)에 관한 것이다.It is therefore an object of the present invention to provide a piston / cylinder assembly for alternating compressors which provides less friction between the piston and the cylinder and thus prevents premature wear of the components .

본 발명은 교호형 컴프레서를 위한 피스톤/실린더 어셈블리를 제공함으로써 상기에 언급된 목적을 달성하되, 상기 피스톤은 상기 실린더 내부에서 왕복 운동을 수행하고, 피스톤 표면 및 실린더 표면은 약 60 ㎚보다 작은 표면 거칠기 파라미터(Rpk) 및 100 ㎚보다 작은 표면 거칠기 파라미터(Rvk)를 갖는 표면 거칠기를 포함하고; 피스톤 표면은 적어도 하나의 지지층 및 적어도 하나의 DLC 층(3)을 포함하는 코팅을 수용한다.The present invention achieves the above-mentioned object by providing a piston / cylinder assembly for an alternating compressor, wherein the piston performs a reciprocating motion within the cylinder, wherein the piston surface and the cylinder surface have a surface roughness A surface roughness having a parameter Rpk and a surface roughness parameter Rvk less than 100 nm; The piston surface receives a coating comprising at least one support layer and at least one DLC layer (3).

본 발명의 바람직한 구체예에서, 실린더 물질은 스테인리스 스틸을 포함하고, 지지층 물질은 나이트라이드 및 술파이드로부터 선택되며, DLC층 물질은 비수소화 비결정질 카본, 수소화 비결정질 카본, 비수소화 정방정계 비결정질 카본, 및 수소화 정방정계 비결정질 카본으로부터 선택된다. 상기 DLC 층은 금속 또는 비금속 합금 성분을 더 포함한다.In a preferred embodiment of the present invention, the cylinder material comprises stainless steel, the support material is selected from the group consisting of nitrides and sulfides, and the DLC layer material comprises non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, Hydrogenated tetragonal amorphous carbon. The DLC layer further comprises a metal or non-metal alloy component.

도 1은 본 발명의 바람직한 구체예에 따른 피스톤/실린더 어셈블리의 코팅의 개략도를 도시한다.
도 2는 최근의 해결안과 본 발명 사이의 비교 그래프를 도시한다.
도 3은 본 발명의 바람직한 구체예에 따른 피스톤/실린더 어셈블리의 코팅된 표면들의 개략도를 도시한다.1 shows a schematic view of a coating of a piston / cylinder assembly according to a preferred embodiment of the present invention.
Figure 2 shows a comparison graph between a recent solution and the present invention.
Figure 3 shows a schematic view of the coated surfaces of a piston / cylinder assembly according to a preferred embodiment of the present invention.

다음으로, 본 발명은 첨부된 도면들에 의해 나타난 실시예들에 근거하여 더 상세하게 설명될 것이다.Next, the present invention will be described in more detail based on the embodiments shown by the accompanying drawings.

윤활유에 의한 윤활이 없을 때에 마모의 작용으로 효과에 영향을 미치지 않고 피스톤/실린더 어셈블리의 정확한 기능을 확보하기 위하여, 본 발명은 표면에 도포된 DLC 코팅의 기계적 강도를 증가시키는 베이스 코팅과 관련된 DLC의 얇은 필름들로 피스톤의 외측 표면을 코팅하기 위하여 제공한다.In order to ensure the correct functioning of the piston / cylinder assembly without affecting the effect of wear in the absence of lubrication with lubricant, the present invention relates to the use of DLC in connection with base coatings to increase the mechanical strength of the DLC coatings applied to the surface For coating the outer surface of the piston with thin films.

따라서, 도 1에 도시된 바와 같이, 본 발명은 바람직하게는 기계 지지층(2) 및 DLC층(3)으로 구성된 코팅을 수용하는 (외측 표면의 일부만이 도시된) 피스톤(1)을 포함한다. 본 발명의 바람직한 구체예에서, 지지층(2) 및 지지층(3)은 대략 3 내지 10 마이크론의 두께를 갖는 코팅을 생성한다.1, the present invention preferably includes a piston 1 (only a portion of the outer surface is shown) that receives a coating composed of a machine support layer 2 and a DLC layer 3. In a preferred embodiment of the present invention, the support layer (2) and the support layer (3) produce a coating having a thickness of approximately 3 to 10 microns.

상기 지지층(2)은 다음의 형태들로 위치된 단일 또는 다중 요소를 포함할 수 있다: 점진적 가변 화학 조성, 일정 화학 조성, 단일층 또는 다중층.The support layer 2 may comprise single or multiple elements located in the following forms: gradual variable chemical composition, constant chemical composition, single layer or multilayer.

또한, 지지층(2)의 조성은 피스톤/실린더 어셈블리의 특정 설계의 기계적 인장력에 따라 변할 수 있되, 상기 층은 나이트라이드(CrN, FeN, TiN, AlTiN, CAlTiN 등), 술파이드(MoS2 및 변형물, WS2 및 변형물 등); 및 피스톤에 작용하는 높은 하중에 기계적 지지를 부여하기 위하여 기판과 DLC 사이에 중간 경도를 갖는 다른 코팅을 포함할 수 있다.In addition, the composition of the support layer (2) is itdoe may vary according to the mechanical tension of the particular design of the piston / cylinder assembly, the layer is nitride (CrN, FeN, TiN, AlTiN, CAlTiN, etc.), sulfide (MoS 2 and variations Water, WS 2, and modifications); And other coatings having medium hardness between the substrate and the DLC to impart mechanical support to the high load acting on the piston.

DLC(3) 층에 대하여, 동일하게 가변적인 비율의 하이드로겐을 갖는 카본계 코팅으로 구성되고, 하기의 변형물을 포함할 수 있다: a-C:H(비수소화 비결정질 카본); a-C:H(수소화 비결정질 카본); ta-C(비수소화 정방정계 비결정질 카본); ta-C:H(수소화 정방정계 비결정질 카본)을 포함할 수 있다. 이런 변형물들 외에, 합금 성분의 첨가는 또한 각 어플리케이션에 대한 특정한 특성을 획득하는 데에 이용될 수 있되, 합금 성분의 첨가물을 갖는 층은 지정된 Me-DCL이고, Me는 (금속 또는 비금속) 첨가 성분을 나타낸다.For the DLC (3) layer, a carbon-based coating having the same variable proportions of hydrogens, and may include the following modifications: a-C: H (non-hydrogenated amorphous carbon); a-C: H (hydrogenated amorphous carbon); ta-C (non-hydrogenated tetragonal amorphous carbon); ta-C: H (hydrogenated tetragonal amorphous carbon). In addition to these variants, the addition of alloy components can also be used to obtain specific properties for each application, with the layer having the additive of the alloy component designated Me-DCL, Me as the (metal or non-metal) additive component .

층(3)의 배치(disposition)는 또한 합금 성분의 비율에 대한 변형물을 포함할 수 있고, 예를 들어, 점진적 가변 화학 조성, 일정 화학 조성, 모노화합물 또는 삽입 형태(intercalated form)로 위치된 DLC 변형물일 수 있다.The disposition of the layer 3 may also include modifications to the proportions of the alloy components and may include, for example, a progressive variable chemical composition, a constant chemical composition, a mono compound or an intercalated form DLC modifications.

DLC 층의 도포는 상기 층을 수용할 피스톤 표면을 마련한 이후에 수행된다. 이런 마련은 표면들의 토포그래픽 측정(topographic measurement)에 의해 획득된 파라미터 Rpk < 60 ㎚ 및 Rvk < 100 ㎚을 갖는 표면 거칠기를 획득하기 위하여 표면 마무리 공정을 포함한다.Application of the DLC layer is performed after providing the piston surface to receive the layer. This arrangement includes a surface finishing process to obtain surface roughness with parameters Rpk < 60 nm and Rvk < 100 nm obtained by topographic measurements of the surfaces.

피스톤/실린더 어셈블리에 대한 마찰의 감소를 확보하기 위하여, 실린더 표면은 표면들의 토포그래픽 측정에 의해 획득된 파라미터 Rpk < 60 ㎚ 및 Rvk < 100 ㎚을 갖는 표면 거칠기를 갖는 실린더 표면을 획득하기 위하여 마련된다.In order to ensure a reduction in friction for the piston / cylinder assembly, the cylinder surface is provided to obtain a cylinder surface with surface roughness having parameters Rpk < 60 nm and Rvk < 100 nm obtained by topographic measurements of the surfaces .

이런 의미에서, 도 2는 상기의 특정된 거칠기를 갖지 않는(도 a) 및 b)) 및 상기의 특정된 거칠기를 갖는(도 c) 및 d)) 표면 상에 DLC 층의 마모를 개략적으로 도시한다.In this sense, Fig. 2 schematically shows the wear of the DLC layer on the surface (Figs. A) and b)) and the above specified roughness (Fig. C) and d) do.

도 a) 및 b)에 도시된 바와 같이, 높은 거칠기 조건 하에서, DLC 층들은 표면 거친 피크(surface harsh peak)에서 접촉 응력의 집중으로 인해 조기 마모를 겪는다(즉, 이것들은 결국 층 상에 정확한 지지 영역을 형성하게 된다). 이어서 이러한 조기 마모는 노출된 피스톤 기판에 남는다.As shown in Figures a) and b), under high roughness conditions, the DLC layers undergo premature wear due to the concentration of contact stress at the surface harsh peak (i.e., they eventually undergo precise support Region. This premature wear then remains on the exposed piston substrate.

그럼에도 불구하고, 거칠기가 도 c) 및 d)에 도시된 바와 같이 - 본 발명에 의해 제안된 파라미터 내에 존재할 때, DLC 층 상에서 점진적이고 부드러운 마모가 접촉 응력의 감소를 야기하는 표면들 사이에 더 큰 지지 영역의 형성으로 인해 발생한다.Nevertheless, when the roughness is present in the parameters suggested by the present invention, as shown in Figs. C) and d), the gradual and smooth wear on the DLC layer is greater between the surfaces causing the reduction of the contact stress Due to the formation of a support region.

본 발명의 바람직한 구체예에서, 상기 피스톤/실린더 어셈블리는 스테인리스 스틸로 제조된다.In a preferred embodiment of the present invention, the piston / cylinder assembly is made of stainless steel.

도 3에 도시된 바와 같이, 스테인리스 스틸 실린더의 이용은 부품들 사이의 상대적인 운동으로 인한 양 접촉 인터페이스들에서 균일하게 분포된 트라이보층(tribolayer) 형성을 감안한다. 상기 변형층은 컴프레서의 나머지 부품들에서 이용된 물질들의 잔기 및 이의 대기 적용뿐 아니라 DCL 및 실린더의 스테인리스 스틸로부터 거친 피크의 (부드러운 마모에 의한) 제거로 인해 형성된다.As shown in Fig. 3, the use of a stainless steel cylinder allows tribolayer formation to be uniformly distributed in both contact interfaces due to relative motion between the components. The strained layer is formed by the removal of coarse peaks (due to soft abrasion) of the DCL and the stainless steel of the cylinder, as well as the residues of materials used in the remaining parts of the compressor and its atmospheric applications.

따라서, 피스톤/실린더 어셈블리의 부품들 중 하나를 가공함으로써 더 길고 지속적인 DLC 코팅의 형성은 피스톤/실린더 어셈블리가 현저한 마모, 낮은 마찰 및 적절한 내구성 없이도 기능을 하는 것을 허용하면서, 마찰 쌍의 기능에 대하여 본질적인, 변형층의 형성을 확보한다.Thus, the formation of a longer and lasting DLC coating by machining one of the parts of the piston / cylinder assembly allows the piston / cylinder assembly to function without substantial wear, low friction and proper durability, , Thereby securing formation of the strained layer.

상기의 도면들에만 근거한 설명은 본 발명의 목적의 가능한 구체예들 중 하나를 나타내되, 보호될 목적의 실제 범위는 첨부된 청구항들에 의해 한정되는 것으로 구성되어야 한다. The description based only on the above figures shows one of the possible embodiments of the object of the present invention, and the actual scope of the object to be protected should be construed as being defined by the appended claims.

Claims (5)

피스톤이 실린더 내부에서 왕복 운동을 수행하는 교호형 컴프레서를 위한 피스톤/실린더 어셈블리에 있어서,
피스톤 표면(1) 및 실린더 표면은 약 60 ㎚보다 작은 표면 거칠기 파라미터(Rpk) 및 100 ㎚보다 작은 표면 거칠기 파라미터(Rvk)를 갖고,
상기 피스톤 표면(1)은 적어도 하나의 지지층(2) 및 적어도 하나의 DLC 층(3)을 포함하는 코팅을 수용하는 것을 특징으로 하는 피스톤/실린더 어셈블리.
CLAIMS 1. A piston / cylinder assembly for an alternating compressor in which the piston performs reciprocating motion within the cylinder,
The piston surface (1) and the 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,
Characterized in that the piston surface (1) receives a coating comprising at least one support layer (2) and at least one DLC layer (3).
제 1 항에 있어서,
실린더 물질은 스테인리스 스틸인 것을 특징으로 하는 피스톤/실린더 어셈블리.
The method according to claim 1,
Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; wherein the cylinder material is stainless steel.
제 1 항 또는 제 2 항에 있어서,
상기 지지층(2)의 물질은 나이트라이드 및 술파이드로부터 선택되는 것을 특징으로 하는 피스톤/실린더 어셈블리.
3. The method according to claim 1 or 2,
Wherein the material of the support layer (2) is selected from the group consisting of nitrides and sulfides.
제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 DLC층(3)의 물질은 비수소화 비결정질 카본, 수소화 비결정질 카본, 비수소화 정방정계 비결정질 카본, 수소화 정방정계 비결정질 카본 또는 이의 조합으로부터 선택되는 것을 특징으로 피스톤/실린더 어셈블리.
4. The method according to any one of claims 1 to 3,
Wherein the material of the DLC layer (3) is selected from non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, hydrogenated tetragonal amorphous carbon or a combination thereof.
제 4 항에 있어서,
상기 DLC 층(3)은 금속 또는 비금속 합금 성분을 더 포함하는 것을 특징으로 하는 피스톤/실린더 어셈블리.
5. The method of claim 4,
Wherein the DLC layer (3) further comprises a metallic or non-metallic alloy component.
KR1020137018894A 2010-12-27 2011-12-08 Piston assembly for alernative compressor KR20140067961A (en)

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