TW201235566A - Piston assembly for alternative compressor - Google Patents

Piston assembly for alternative compressor Download PDF

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Publication number
TW201235566A
TW201235566A TW100149001A TW100149001A TW201235566A TW 201235566 A TW201235566 A TW 201235566A TW 100149001 A TW100149001 A TW 100149001A TW 100149001 A TW100149001 A TW 100149001A TW 201235566 A TW201235566 A TW 201235566A
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Taiwan
Prior art keywords
piston
cylinder
hydrogenated
amorphous carbon
cylinder assembly
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TW100149001A
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Chinese (zh)
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TWI461605B (en
Inventor
Marcio Silverio
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Whirlpool Sa
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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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Chemical Vapour Deposition (AREA)

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

201235566 六、發明說明： 【發明所屬之技術領域】 本發明係關於用於替代型壓縮機之活塞/氣缸總成且 更特定言之係關於用於線性壓縮機之活塞/氣缸總成。 【先前技術】 壓縮機之功能為將已確定體積之流體的壓力提昇至為實 現冷卻循環所需之壓力。業界已知所謂的替代型壓縮機， 在此類替代型壓縮機中活塞在氣缸内部往復地滑動以進行 氣體之壓縮。 在往復活塞與氣缸之間的接觸可產生高的機械損耗，且 可導致在壓縮機中的損壞及永久性故障。此外，在部件之 間的此類接觸可增加雜訊、操作溫度、壓縮機振動、及有 效性損失，因而亦助長了設備能量功率消耗之增加。 在一些類型之壓縮機中，預測到在移動部件之間的潤滑 油；然而，在針對線性壓縮機之一些應用中，油的存在為 有害的。 在不使用潤滑油的情況下嘗試解決關於活塞/氣缸摩擦 之此問題的過程中，已開發出在此類部件中使用特殊塗層 之一些技術解決方案。 亦即（例如）在美國專利第6,641 337號及JP 2〇〇11〇786〇中 所揭示之解決方案的狀況，該等解決方案指代對壓縮機之 移動部件應用DLC(類鑽碳）。 然而’甚至此等已知之解決方案並未完全解決在部件之 間的應力接觸及由此導致的磨損之問題，此係因為在Dlc 160803.doc 201235566 之粗硬尖峰上之接觸應力的集中最終導致塗層之永久性磨 損。 本發明之目標 因此，本發明之目標係關於一種用於替代型壓縮機之活 塞/氣缸總成，該活塞/氣缸總成提供在活塞與氣缸之間的 較少摩擦’因而防止該等部件之永久性磨損。 【發明内容】 本發明藉由提供替代型壓縮機之活塞/氣缸總成來達成 上文知：及之目標’其中該活塞在該氣缸内部執行往復移 動’其中活塞表面及氣缸表面包含具有小於約60的表面粗 糙度參數Rpk及小於1〇〇 nm的表面粗糙度參數Rvk之表面 粗糙度；且該活塞表面接收包含至少一支撐層及至少一 DLC層（3)之一塗層。 在本發明之較佳實施例中，該氣缸材料包含不鏽鋼，該 支撐層材料選自氮化物及硫化物，及該1)]1(：：層材料選自非 氫化非晶碳、氫化非晶碳、非氫化正方晶非晶碳及氫化正 方晶非晶碳。該DLC層可進一步包含金屬及非金屬合金元 素。 【實施方式】 接下來，將基於由所附圖式所呈現之執行實例來更詳細 地描述本發明。 為在不會因磨損作用及润滑油的潤滑作用之缺乏而影變 有效性的情況下確保活塞/氣缸總成之正確運作，本發明 提供用薄DIX膜來塗㈣活塞之外表面，料薄則膜與 160803.doc 201235566 一基底塗層相關聯’該基底塗層增加了塗覆至該表面的 DLC塗層之機械強度。 因此，如自圖1可見，本發明包含活塞1(僅說明其外表 面之一部分）’活塞1接收較佳地由機械支撐層2及DLC層3 構成之塗層。在本發明之較佳實施例中，支揮層2及支樓 層3產生具有大致3微米至10微米之厚度的塗層。 該支撐層2可包含以下列形式安置之單一或多個元件： 可逐漸變化之化學成份，恆定化學成份，單層或多層。 此外，支撐層2之組成可根據活塞/氣缸總成的特定設計 之機械張力而變化，其令該層可包含氮化物（CrN、FeN、 TiN、AlTiN、CAlTiN等）、硫化物（MoS2及其變體，WS2及 其變體等）；及其他塗層，該等其他塗層具有在基板與 DLC之間的中間硬度以對作用於該活塞上之高負載給予機 械支撑。 關於DLC 3層，其由具有可變化的氫比例之碳基塗層構 成，且其亦可含有下列變體：a-C:H(非氫化非晶碳）、a_ C:H(氫化非晶碳）、ta-C(非氫化正方晶非晶碳）、ta-C:H(氫 化正方晶非晶碳）。除此等變體以外，亦可使用添加合金 元素來獲得用於每一應用之特定性質，其中將經添加合金 元素之層指定為Me-DCL，其中Me指代所添加之（金屬或非 金屬）元素。 層3之配置亦可包含有關合金元素的比例之變體’且可 為（例如）：可逐漸變化的化學成份、慄定化學成份、單一 化合物或以插入形式安置之DLC變體。 5 160803.doc 201235566 在製備將要接收DLC層之活塞表面之後進行該DLC層之 塗覆。此製備涉及表面修整過程以便獲得由該等表面的形 態量測所獲得之具有參數RpkdO ηηι及Rvk<l〇〇 nm的表面 粗糙度。 為確保在活塞/氣缸總成上的摩擦減小，該氣缸表面經 製備以便獲得由該等表面之形態量測所達成之具有參數 Rpk<6〇nmARvk<100nm的表面粗糙度之氣缸表面。 在此意義上，圖2示意性地展示在無上文指定的粗糙度 之情況下（圖a)及圖b))及在具有上文指定的粗糙度之情況 下（圖c)及圖d))在表面上的DLC層之磨損。 如自圖a)及圖b)可見，在高粗糙度條件下，dlc層經歷 歸因於在表面粗硬尖峰（亦即，其最終在該層上形成點狀 支撐區域）中的接觸應力之集中的永久性磨損。此類永久 性磨損接著留下暴露之活塞基板。 然而，當粗糙度處於本發明所提議之參數内時（諸如在 圖c)及圖d)中所展示）’歸因於在該等表面之間的較大支樓 區域之形成，從而造成接觸應力之減小，在DLC層上發生 逐漸且緩和之磨損。 ，在本發明之較佳實施例中，該活塞/氣缸總成由不鏽鋼 製成。 如自圖3可見，使用不鏽鋼氣缸允許歸因於部件之間的 相對移動之均-分佈於兩接觸界面處的摩擦層⑻b心㈣ 形成。歸因於來自氣缸之不鏽鋼之粗硬尖峰#消除（藉由 緩和之磨損）以及在壓縮機的剩餘部件中所使用的材^之 160803.doc 201235566 殘留及壓縮機之大氣壓施加，該摩擦層形成。 因此’藉由製造活塞/氣缸總成的部件中之一者而產生 的較持久DLC塗層之形成確保了摩擦層之形成，該摩擦層 對於摩擦配對之運料不可缺少的，從而允許該活塞/氣 红總成在無顯著磨損的情況下運作，允許低摩擦及適宜持 久性。 應理解基於以上圖式之此描述僅指代本發明之目標之可 能實施例中之一者’其中需保護的該目標之真實範疇由所 附申請專利範圍來界定。 【圖式簡單說明】 圖1說明根據本發明之較佳實施例的活塞/氣缸總成之塗 層的示意圖。 圖1說明根據本發明之較佳實施例的活塞/氣缸總成之塗 層的示意圖。 圖2說明在本發明與當前技術的解決方案之間的比較性 圖解呈現。 圖3說明根據本發明之較佳實施例的活塞/氣缸總成之經 塗佈表面的示意性呈現。 【主要元件符號說明】 2 3 活塞表面 機械支撐層 類鑽碳（DLC)層/支撐層 160803.doc201235566 VI. Description of the Invention: [Technical Field] The present invention relates to a piston/cylinder assembly for an alternative compressor and more particularly to a piston/cylinder assembly for a linear compressor. [Prior Art] The function of the compressor is to raise the pressure of the fluid of a determined volume to the pressure required to achieve the cooling cycle. So-called alternative compressors are known in the art, in which the piston slides back and forth inside the cylinder for gas compression. Contact between the reciprocating piston and the cylinder can result in high mechanical losses and can result in damage and permanent failure in the compressor. In addition, such contact between components can increase noise, operating temperature, compressor vibration, and loss of effectiveness, thereby contributing to an increase in energy consumption of the device. In some types of compressors, lubricating oil between moving parts is predicted; however, in some applications for linear compressors, the presence of oil is detrimental. In the process of attempting to solve this problem with piston/cylinder friction without the use of lubricating oil, some technical solutions have been developed for the use of special coatings in such components. That is, for example, the state of the solution disclosed in U.S. Patent No. 6,641,337 and JP 2 〇〇 11 〇 786, which is incorporated herein by reference to the application of DLC (Drilling Carbon) to the moving parts of the compressor. However, even these known solutions do not completely solve the problem of stress contact between components and the resulting wear, which is ultimately caused by the concentration of contact stress on the hard peaks of Dlc 160803.doc 201235566. Permanent wear of the coating. OBJECT OF THE INVENTION Accordingly, the present invention is directed to a piston/cylinder assembly for an alternative compressor that provides less friction between the piston and the cylinder and thus prevents such components from Permanent wear and tear. SUMMARY OF THE INVENTION The present invention achieves the above by providing a piston/cylinder assembly of an alternative compressor: and wherein the piston performs a reciprocating movement inside the cylinder, wherein the piston surface and the cylinder surface contain less than about a surface roughness parameter Rpk of 60 and a surface roughness parameter Rvk of less than 1 〇〇 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 the group consisting of nitrides and sulfides, and the 1)]1 (:: layer material is selected from the group consisting of non-hydrogenated amorphous carbon, hydrogenated amorphous Carbon, non-hydrogenated tetragonal amorphous carbon and hydrogenated tetragonal amorphous carbon. The DLC layer may further comprise metal and non-metal alloying elements. [Embodiment] Next, based on the execution example presented by the drawings The present invention is described in more detail. To ensure proper operation of the piston/cylinder assembly without the effects of wear and the lack of lubrication of the lubricating oil, the present invention provides coating with a thin DIX film (4) The outer surface of the piston, the thin film is associated with a base coating of 160803.doc 201235566. The base coating increases the mechanical strength of the DLC coating applied to the surface. Thus, as can be seen from Figure 1, the present invention Containing a piston 1 (only a portion of its outer surface is illustrated) 'Piston 1 receives a coating preferably composed of a mechanical support layer 2 and a DLC layer 3. In a preferred embodiment of the invention, the support layer 2 and the support floor 3 produced with roughly 3 micro a coating having a thickness of up to 10 microns. The support layer 2 may comprise a single or multiple components arranged in the form of: a gradual change in chemical composition, a constant chemical composition, a single layer or multiple layers. Furthermore, the composition of the support layer 2 It may vary depending on the mechanical tension of the particular design of the piston/cylinder assembly, which may include nitride (CrN, FeN, TiN, AlTiN, CAlTiN, etc.), sulfide (MoS2 and its variants, WS2 and its variations). And other coatings having an intermediate hardness between the substrate and the DLC to impart mechanical support to the high load acting on the piston. Regarding the DLC 3 layer, which has a variable hydrogen A carbon-based coating of a ratio, and may also contain the following variants: aC: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, it is also possible to use alloying elements to obtain specific properties for each application, wherein the layer to which the alloying elements are added is designated as Me-DCL, where Me refers to the addition (metal or non-metal) The configuration of layer 3 may also include a variant of the ratio of alloying elements' and may be, for example, a gradual change in chemical composition, a saponin chemical composition, a single compound or a DLC variant placed in an inserted form. 160803.doc 201235566 The coating of the DLC layer is performed after preparing the surface of the piston to be received by the DLC layer. This preparation involves a surface finishing process to obtain the parameters RpkdO ηηι and Rvk<l〇 obtained from the morphometric measurements of the surfaces. Surface roughness of 〇nm. To ensure a reduction in friction on the piston/cylinder assembly, the cylinder surface is prepared to obtain a surface having a parameter Rpk < 6 〇 nmARvk < 100 nm achieved by morphometry of the surfaces Roughness of the cylinder surface. In this sense, Figure 2 is schematically shown in the absence of the roughness specified above (Figure a) and Figure b)) and in the case of the roughness specified above (Figure c) and Figure d )) Wear of the DLC layer on the surface. As can be seen from Figure a) and Figure b), under high roughness conditions, the layer of dlc undergoes contact stress due to the hard peaks on the surface (i.e., it eventually forms a point-like support region on the layer). Concentrated permanent wear. This type of permanent wear then leaves the exposed piston substrate. However, when the roughness is within the parameters proposed by the present invention (such as shown in Figure c) and Figure d), 'caused by the formation of a larger branch area between the surfaces, causing contact The reduction in stress causes gradual and moderate wear on the DLC layer. In a preferred embodiment of the invention, the piston/cylinder assembly is made of stainless steel. As can be seen from Figure 3, the use of stainless steel cylinders allows for the formation of a friction layer (8)b core (4) that is distributed at the two contact interfaces due to the relative movement between the components. The friction layer is formed due to the coarse hard spike # elimination from the stainless steel of the cylinder (by mitigating wear) and the use of the material used in the remaining parts of the compressor, 160803.doc 201235566 residual and atmospheric pressure of the compressor. . Thus the formation of a relatively long-lasting DLC coating produced by one of the components of the piston/cylinder assembly ensures the formation of a friction layer that is indispensable for friction-matched transport, thereby allowing the piston The gas red assembly operates without significant wear, allowing for low friction and durability. It is to be understood that the description of the above description is only one of the possible embodiments of the present invention. The true scope of the object to be protected is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a schematic view of a coating of a piston/cylinder assembly in accordance with a preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a schematic view of a coating of a piston/cylinder assembly in accordance with a preferred embodiment of the present invention. Figure 2 illustrates a comparative graphical representation between the present invention and a solution of the prior art. Figure 3 illustrates a schematic representation of a coated surface of a piston/cylinder assembly in accordance with a preferred embodiment of the present invention. [Main component symbol description] 2 3 Piston surface Mechanical support layer Drilling carbon (DLC) layer / support layer 160803.doc

Claims (1)

201235566 七、申請專利範圍： 1. 一種用於一替代型壓縮機之活塞/氣缸總成，其中該活塞 在該氣缸内部執行一往復移動，其特徵在於： 活塞表面（1)及氣缸表面具有一小於約6〇 ηιη之表面粗 • 糙度參數RPk及一小於1〇〇 nm之表面粗糙度參數Rvk ; • 該活塞表面（1)接收包含至少一支撐層2及至少一DLC 層（3)之一塗層。 2. 如請求項1之活塞/氣缸總成，其中該氣缸材料為不鏽 鋼。 3. 如請求項丨或2之活塞/氣缸總成，其中該支撐層〇之材 料選自氮化物及硫化物。 4. 如請求項1或2之活塞/氣缸總成，其中該DLC層（3)之材 料選自非氫化非晶碳、氫化非晶碳、非氫化正方晶非晶 碳及氫化正方晶非晶碳或該等材料之組合。 5. 如請求項4之活塞/氣缸總成，其中該DLC層（3)進一步包 含金屬或非金屬合金元素。 6. 如請求項3之活塞/氣缸總成，其中該DLC層（3)之該材料 選自非氫化非晶碳、氫化非晶碳、非氫化正方晶非晶碳 " 及氫化正方晶非晶碳或該等材料之組合。 160803.doc201235566 VII. Patent Application Range: 1. A piston/cylinder assembly for an alternative compressor, wherein the piston performs a reciprocating movement inside the cylinder, characterized in that: the piston surface (1) and the cylinder surface have a a surface roughness of less than about 6 〇ηη • a roughness parameter RPk and a surface roughness parameter Rvk of less than 1 〇〇 nm; • the piston surface (1) receives at least one support layer 2 and at least one DLC layer (3) a coating. 2. The piston/cylinder assembly of claim 1 wherein the cylinder material is stainless steel. 3. The piston/cylinder assembly of claim 2 or 2, wherein the material of the support layer is selected from the group consisting of nitrides and sulfides. 4. The piston/cylinder assembly of claim 1 or 2, wherein the material of the DLC layer (3) is selected from the group consisting of non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon, and hydrogenated tetragonal amorphous Carbon or a combination of such materials. 5. The piston/cylinder assembly of claim 4, wherein the DLC layer (3) further comprises a metal or non-metal alloying element. 6. The piston/cylinder assembly of claim 3, wherein the material of the DLC layer (3) is selected from the group consisting of non-hydrogenated amorphous carbon, hydrogenated amorphous carbon, non-hydrogenated tetragonal amorphous carbon " and hydrogenated tetragonal non-carbon Crystalline carbon or a combination of such materials. 160803.doc
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CN103298972B (en) 2016-12-21

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