WO2012169763A2 - Swing link for a scroll compressor and method for treating the surface of same - Google Patents

Swing link for a scroll compressor and method for treating the surface of same Download PDF

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Publication number
WO2012169763A2
WO2012169763A2 PCT/KR2012/004428 KR2012004428W WO2012169763A2 WO 2012169763 A2 WO2012169763 A2 WO 2012169763A2 KR 2012004428 W KR2012004428 W KR 2012004428W WO 2012169763 A2 WO2012169763 A2 WO 2012169763A2
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WO
WIPO (PCT)
Prior art keywords
swing link
scroll compressor
cylindrical portion
swing
scroll
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PCT/KR2012/004428
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French (fr)
Korean (ko)
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WO2012169763A3 (en
Inventor
윤은영
최용완
주상현
배재현
신진영
이재욱
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한국델파이주식회사
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Publication of WO2012169763A2 publication Critical patent/WO2012169763A2/en
Publication of WO2012169763A3 publication Critical patent/WO2012169763A3/en

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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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
    • C23C8/48—Nitriding
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces

Definitions

  • the present invention relates to a swing link for a scroll compressor, and more particularly, to a swing link for a scroll compressor and a surface treatment method having improved wear resistance, corrosion resistance, durability, and the like.
  • the scroll compressor was developed by Leon Creux, France, and obtained a patent in the United States in 1905. However, the scroll compressor was put into practical use in the 1980s when ultra precision processing technology and gas leakage prevention technology could be applied.
  • This scroll compressor was developed by Sanden as a refrigerant compressor for automobile air conditioners in 1981, and Hitachi developed as a refrigerant compressor for residential air conditioners in 1983, and after its success in practical use, research and development to implement an improved structure for many manufacturers. This is going on.
  • Scroll compressor has advantages such as high efficiency, low noise, low vibration and light weight compared to other types of compressors. Especially, it is suitable for the installation of inverter and it can automatically prevent overpressure when liquid refrigerant or foreign matter is injected into the compressor. It has structural features. Due to these advantages, the current use of scroll compressors have been extended to 2 to 20 tons of cooling capacity, which can be applied not only to residential air conditioners but also to room air conditioners and commercial air conditioners.
  • Such scroll compressors include two scrolls that are relatively pivotable in engagement with each other, and the two scrolls consist of a fixed scroll and an orbiting scroll.
  • Each scroll has a circular end plate and a wrap or spiral element protruding from the circular end plate. Accordingly, each of the helical elements of the fixed scroll and the movable scroll is interlocked with each other, and the movable scroll is rotated relative to the fixed scroll so that at least one of the helical elements of the movable scroll and the fixed scroll moves in varying volume.
  • a fluid pocket is formed. As the turning operation of the movable scroll proceeds, the fluid pocket moves to the discharge port of the housing, and its volume decreases. Accordingly, the refrigerant fluid in the fluid pocket is compressed and discharged through the discharge port.
  • the movable scroll of the scroll compressor is driven by a drive shaft, which is driven by an external power source.
  • the movable scroll is installed eccentrically with respect to the drive shaft via the swing link, and the movable scroll pivots eccentrically with respect to the center of the drive shaft by the rotation of the drive shaft.
  • the swing link is configured to compensate for the turning radius of the movable scroll, and one side of the swing link is formed with a through hole through which the driving pin of the drive shaft is rotated.
  • the drive pin of the drive shaft is radially eccentric from the center of the drive shaft.
  • the present invention has been made to solve the above problems, the technical problem of the present invention is to provide a scroll compressor swing link and its surface treatment method improved wear resistance, corrosion resistance, durability and the like.
  • the surface treatment method of the scroll compressor swing link for surface treatment of the outer surface of the swing compressor scroll link having a cylindrical portion and the balance weight according to an embodiment of the present invention for achieving the above object, the inside of the swing link A stress removing step of removing stress; Normalizing the inner structure of the swing link; And a low temperature soft nitriding step of cooling the swing link in an inert nitriding furnace after leaving the swing link for a predetermined time in the soft nitriding furnace of the gas soft nitriding atmosphere.
  • the stress relief step may be cooled slowly after maintaining the swing link for 120 ⁇ 10 minutes at a temperature of 480 ⁇ 660 °C.
  • the normalizing step may be air quenching after maintaining the swing link for 180 ⁇ 10 minutes at a temperature of 820 ⁇ 930 °C.
  • the swing link In the low temperature soft nitriding step, the swing link is maintained at a temperature of 580 ⁇ 10 ° C. for 300 ⁇ 30 minutes in a soft nitriding furnace of a gas soft nitriding atmosphere, and then cooled in an inert nitriding furnace of 260 ° C. or less, and the surface of the swing link is Stained residues can be removed by washing.
  • the swing link for a scroll compressor includes a cylindrical portion that is rotatably supported on the movable scroll side and a balance weight integrally formed on the cylindrical portion, and a through hole is formed on one side of the cylindrical portion, and the through hole
  • the drive pin of the drive shaft is inserted to be rotatably supported, and the carbon nitride compound layer is formed on the surface of the swing link by low temperature soft nitridation treatment.
  • the hardness of the carbon nitride compound layer formed on the surface of the swing link may be HK732 or more.
  • the carbon nitride compound layer may be uniformly formed to a thickness of 10 ⁇ 20 ⁇ m.
  • the swing compressor swing link includes a cylindrical portion rotatably supported on the movable scroll side, and a balance weight integrally formed with the cylindrical portion. On the surface of the cylindrical portion and the balance weight, a carbon nitride compound layer formed through stress removal, normalization, and low temperature soft nitriding is formed.
  • the carbon nitride compound layer may be uniformly formed to a thickness of 10 ⁇ 20 ⁇ m.
  • the cylindrical portion and the balance weight may be formed of a dutile iron casting material.
  • the surface of the swing link in particular, the inner surface of the through hole in which the driving pin of the drive shaft is inserted and rotated and the entire surface of the swing link is nitrided, wear resistance, corrosion resistance, etc. are improved, so that the entire scroll compressor There is an advantage that can significantly improve the durability.
  • FIG. 1 is a perspective view illustrating a swing link for a scroll compressor according to an embodiment of the present invention.
  • FIG. 2 is a process chart showing a surface treatment method of a scroll compressor swing link according to an embodiment of the present invention.
  • the swing link 10 for a scroll compressor includes a cylindrical portion 11 that is rotatably supported on a movable scroll side and a balance weight 12 connected to one side of the cylindrical portion 11. ).
  • the cylindrical portion 11 is formed with a through hole 11a into which the driving pin 21 of the driving shaft 20 is inserted, and the outer circumferential surface of the cylindrical portion 11 is rotatably supported on the movable scroll side through a bearing or the like.
  • the through hole 11a of the cylindrical portion 11 preferably has sufficient surface hardness as the driving pin 21 of the drive shaft 20 is inserted into and rotated on the inner diameter surface thereof.
  • the drive pin 21 is radially eccentrically positioned at the center of the drive shaft 20, and the balance weight 12 is integrally formed on one side of the cylindrical portion 11.
  • Swing link 10 has the advantage that the wear resistance, corrosion resistance, etc. is improved as the outer surface, in particular, the inner surface of the through hole (11a) of the swing link 10 is surface treated by nitriding heat treatment.
  • Figure 2 shows a surface treatment method of the swing link for the scroll compressor according to the present invention, comprising a stress removing step (S1), normalizing step (S2), low temperature soft nitriding step (S3).
  • a swing link 10 formed of a dutile cast iron material is prepared. As described above, the swing link 10 is shaped into a shape having a cylindrical portion 11 and a balance weight 12.
  • the stress removing step (S1) is a process of removing the internal stress of the swing link 10, and preferably, the swing link 10 is slowly cooled after maintaining the swing link 10 at a temperature of 480 ⁇ 660 ° C. for 120 ⁇ 10 minutes. down slowly).
  • Normalizing step (S2, normalizing) is a process of making the internal structure of the stress-reduced swing link 10 into an even structure, preferably maintaining the swing link 10 at a temperature of 820 ⁇ 930 °C for 180 ⁇ 10 minutes After air quenching.
  • the low-temperature nitro-carburizing (S3) step involves swinging the swing link 10 at a temperature of 580 ⁇ 10 ° C. in a nitro-carburizing furnace in a gaseous ferritic nitro-carburzing atmosphere. The furnace is maintained for 300 ⁇ 30 minutes and then cooled in an inert nitriding furnace of 260 ° C or less. Thereafter, the residue on the surface of the swing link 10 is removed by washing.
  • the swing link 10 according to the present invention is uniformly formed with a thickness of 10-20 ⁇ m on the surface of an epsilon iron carbon-nitride compound layer, and its surface hardness. Is greater than or equal to HRC (HK732).
  • the surface of the swing link 10 in particular, the inner surface of the through hole 11a in which the driving pin 21 of the drive shaft 20 is inserted and rotatably supported or the entire surface of the swing link 10 is nitrided.
  • wear resistance and corrosion resistance are improved, thereby greatly improving the overall durability of the scroll compressor.
  • the present invention relates to a method for treating the surface of a swing link for a scroll compressor, which can be applied to the manufacture of a scroll compressor has industrial applicability.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Rotary Pumps (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

The present invention relates to a swing link for a scroll compressor, and more particularly, to a swing link for a scroll compressor having improved abrasion resistance, corrosion resistance, and durability, and to a method for treating the surface of the swing link. The method for treating the surface of the swing link for the scroll compressor, which involves treating the outer surface of the swing link for the scroll compressor having a cylindrical unit and a balance weight, comprises: a stress-removing step of removing internal stresses of the swing link; a normalizing step of smoothing the internal organization of the swing link; and a low-temperature nitrocarburizing step of leaving the swing link in a gaseous nitrocarburizing atmosphere in a nitrocarburizing furnace for a predetermined period of time and then cooling the swing link in an inactive nitrification furnace.

Description

스크롤압축기용 스윙링크 및 그 표면처리방법Swing compressor for scroll compressor and surface treatment method
본 발명은 스크롤압축기용 스윙링크에 관한 것으로, 보다 상세하게는 내마모성, 내식성, 내구성 등이 향상된 스크롤압축기용 스윙링크 및 그 표면처리방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing link for a scroll compressor, and more particularly, to a swing link for a scroll compressor and a surface treatment method having improved wear resistance, corrosion resistance, durability, and the like.
스크롤압축기는 프랑스의 Leon Creux에 의해 개발되어 1905년 미국에서 특허를 취득하였으나 초정밀가공기술 및 가스누설 방지기술의 적용이 가능해진 1980년대 들어와서 그 실용화가 이루어졌다. 이러한 스크롤압축기는 1981년에 Sanden이 자동차 에어컨용 냉매압축기로, 1983년에 Hitachi가 거주형 에어컨용 냉매압축기로 개발하여 그 실용화에 성공한 후에, 많은 제조업체에서 보다 개선된 구조를 구현하기 위한 연구 및 개발이 진행되고 있다.The scroll compressor was developed by Leon Creux, France, and obtained a patent in the United States in 1905. However, the scroll compressor was put into practical use in the 1980s when ultra precision processing technology and gas leakage prevention technology could be applied. This scroll compressor was developed by Sanden as a refrigerant compressor for automobile air conditioners in 1981, and Hitachi developed as a refrigerant compressor for residential air conditioners in 1983, and after its success in practical use, research and development to implement an improved structure for many manufacturers. This is going on.
스크롤압축기는 다른 종류의 압축기에 비해 고효율, 저소음, 저진동 및 경량 등의 장점을 가지고 있으며, 특히 인버터를 장착하였을 때의 적합성 및 압축기 내에 액냉매나 이물질이 주입되었을 때 과압을 자동으로 방지할 수 있는 구조적 특징을 가지고 있다. 이러한 장점에 의해 현재 스크롤압축기의 사용범위는 냉방능력이2~20ton으로 확장되었으며, 이는 거주형 에어컨 뿐만 아니라 룸에어컨, 영업용 에어컨 등에도 적용가능하다.Scroll compressor has advantages such as high efficiency, low noise, low vibration and light weight compared to other types of compressors. Especially, it is suitable for the installation of inverter and it can automatically prevent overpressure when liquid refrigerant or foreign matter is injected into the compressor. It has structural features. Due to these advantages, the current use of scroll compressors have been extended to 2 to 20 tons of cooling capacity, which can be applied not only to residential air conditioners but also to room air conditioners and commercial air conditioners.
이러한 스크롤압축기는 서로 맞물려 상대적으로 선회가능한 2개의 스크롤을포함하고, 2개의 스크롤은 고정스크롤(fixed scroll) 및 가동스크롤(orbiting scroll)로 구성된다. 각 스크롤은 원형 단부판(circular end plate)과 이 원형 단부판에서 돌출된 나선형요소(wrap or spiral element)를 가진다. 이에 고정스크롤 및 가동스크롤의 각 나선형요소는 서로 맞물려 배치되고, 가동스크롤이 고정스크롤에 대해 상대적으로 선회함에 따라 가동스크롤의 나선형요소와 고정스크롤의 나선형요소 사이에는 그 체적이 가변되면서 이동하는 하나 이상의 유체포켓(fluid pocket)이 형성된다. 가동스크롤의 선회작동이 진행될수록 유체포켓은 하우징의 토출포트로 이동하면서 그 체적이 감소하고, 이에 따라 유체포켓 내의 냉매유체는 압축되어 토출포트를 통해 토출된다.Such scroll compressors include two scrolls that are relatively pivotable in engagement with each other, and the two scrolls consist of a fixed scroll and an orbiting scroll. Each scroll has a circular end plate and a wrap or spiral element protruding from the circular end plate. Accordingly, each of the helical elements of the fixed scroll and the movable scroll is interlocked with each other, and the movable scroll is rotated relative to the fixed scroll so that at least one of the helical elements of the movable scroll and the fixed scroll moves in varying volume. A fluid pocket is formed. As the turning operation of the movable scroll proceeds, the fluid pocket moves to the discharge port of the housing, and its volume decreases. Accordingly, the refrigerant fluid in the fluid pocket is compressed and discharged through the discharge port.
스크롤압축기의 가동스크롤은 구동축에 의해 구동되며, 이 구동축은 외부의 동력원에 의해 구동한다. 가동스크롤은 스윙링크를 매개로 구동축에 대해 편심되게 설치되고, 구동축의 회전에 의해 가동스크롤은 구동축의 중심에 대해 편심적으로 선회한다. 스윙링크는 가동스크롤의 선회반경을 보상하도록 구성되며, 스윙링크의 일측에는 구동축의 구동핀이 회전지지되는 관통공이 형성되어 있다. 구동축의 구동핀은 구동축의 중심으로부터 반경방향으로 편심되어 있다.The movable scroll of the scroll compressor is driven by a drive shaft, which is driven by an external power source. The movable scroll is installed eccentrically with respect to the drive shaft via the swing link, and the movable scroll pivots eccentrically with respect to the center of the drive shaft by the rotation of the drive shaft. The swing link is configured to compensate for the turning radius of the movable scroll, and one side of the swing link is formed with a through hole through which the driving pin of the drive shaft is rotated. The drive pin of the drive shaft is radially eccentric from the center of the drive shaft.
한편, 구동축의 구동핀이 스윙링크의 관통공 내에 삽입되어 회전지지됨에 따라 스크롤압축기의 내구성 시험도중에 스윙링크의 관통공 내경면이 쉽게 마모되는 현상이 쉽게 발생하고, 이로 인해 스윙링크의 관통공 내경면에 데브리스(debris)가 생성되어 스크롤압축기의 전체 내구성을 저하시키는 단점이 있었다.On the other hand, as the driving pin of the drive shaft is inserted into the through hole of the swing link and is rotated and supported, the phenomenon that the inner diameter surface of the through hole of the swing link easily wears out during the durability test of the scroll compressor, and thus the inside diameter of the swing link through hole Debris is generated on the surface has a disadvantage in reducing the overall durability of the scroll compressor.
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로, 본 발명의 기술적 과제는 내마모성, 내식성, 내구성 등이 향상된 스크롤압축기용 스윙링크 및 그 표면처리방법을 제공하는 것이다.The present invention has been made to solve the above problems, the technical problem of the present invention is to provide a scroll compressor swing link and its surface treatment method improved wear resistance, corrosion resistance, durability and the like.
상기와 같은 목적을 달성하기 위한 본 발명의 한 실시예에 따른 원통부 및 밸런스웨이트를 가진 스크롤압축기용 스윙링크의 외면을 표면처리하는 스크롤압축기용 스윙링크의 표면처리방법은, 상기 스윙링크의 내부 응력을 제거하는 응력제거단계; 상기 스윙링크의 내부 조직을 고르게 하는 노말라이징단계; 및 상기 스윙링크를 가스 연질화분위기의 연질화로 내에서 일정 시간 동안 방치한 후에 비활성 질화로 내에서 냉각시키는 저온 연질화단계를 포함한다.The surface treatment method of the scroll compressor swing link for surface treatment of the outer surface of the swing compressor scroll link having a cylindrical portion and the balance weight according to an embodiment of the present invention for achieving the above object, the inside of the swing link A stress removing step of removing stress; Normalizing the inner structure of the swing link; And a low temperature soft nitriding step of cooling the swing link in an inert nitriding furnace after leaving the swing link for a predetermined time in the soft nitriding furnace of the gas soft nitriding atmosphere.
상기 응력제거단계는 상기 스윙링크를 480~660℃의 온도에서 120±10분 동안 유지후 서냉시킬 수 있다.The stress relief step may be cooled slowly after maintaining the swing link for 120 ± 10 minutes at a temperature of 480 ~ 660 ℃.
상기 노말라이징단계는 상기 스윙링크를 820~930℃의 온도에서 180±10분 동안 유지후 공랭(air quenching)시킬 수 있다.The normalizing step may be air quenching after maintaining the swing link for 180 ± 10 minutes at a temperature of 820 ~ 930 ℃.
상기 저온 연질화단계는 상기 스윙링크를 가스 연질화 분위기의 연질화로 내에서 580±10℃의 온도로 300±30분 동안 유지한 후에 260 ℃이하의 비활성 질화로에서 냉각시키고, 상기 스윙링크의 표면에 묻은 잔류물을 세척을 통해 제거할 수 있다.In the low temperature soft nitriding step, the swing link is maintained at a temperature of 580 ± 10 ° C. for 300 ± 30 minutes in a soft nitriding furnace of a gas soft nitriding atmosphere, and then cooled in an inert nitriding furnace of 260 ° C. or less, and the surface of the swing link is Stained residues can be removed by washing.
본 발명의 한 실시예에 따른 스크롤압축기용 스윙링크는 가동스크롤 측에 회전지지되는 원통부 및 상기 원통부에 일체로 형성된 밸런스웨이트를 구비하며, 상기 원통부의 일측에 관통공이 형성되며, 상기 관통공에는 구동축의 구동핀이 회전지지되게 삽입되며, 상기 스윙링크의 표면에는 저온 연질화처리에 의해 카본 나이트라이드 화합물층이 형성된다.The swing link for a scroll compressor according to an embodiment of the present invention includes a cylindrical portion that is rotatably supported on the movable scroll side and a balance weight integrally formed on the cylindrical portion, and a through hole is formed on one side of the cylindrical portion, and the through hole The drive pin of the drive shaft is inserted to be rotatably supported, and the carbon nitride compound layer is formed on the surface of the swing link by low temperature soft nitridation treatment.
상기 스윙링크의 표면에 형성된 카본 나이트라이드 화합물층의 경도가 HK732 이상일 수 있다.The hardness of the carbon nitride compound layer formed on the surface of the swing link may be HK732 or more.
상기 카본 나이트라이드 화합물층은 10~20㎛의 두께로 균일하게 형성될 수 있다.The carbon nitride compound layer may be uniformly formed to a thickness of 10 ~ 20㎛.
본 발명의 다른 실시예에 따른 스크롤압축기용 스윙링크는, 가동스크롤 측에 회전지지되는 원통부, 그리고 상기 원통부에 일체로 형성되는 밸런스웨이트를 포함한다. 상기 원통부와 상기 밸런스웨이트의 표면에는 응력 제거, 노멀라이징, 및 저온 연질화를 통해서 형성되는 카본 나이트라이드 화합물층이 형성된다.The swing compressor swing link according to another embodiment of the present invention includes a cylindrical portion rotatably supported on the movable scroll side, and a balance weight integrally formed with the cylindrical portion. On the surface of the cylindrical portion and the balance weight, a carbon nitride compound layer formed through stress removal, normalization, and low temperature soft nitriding is formed.
상기 카본 나이트라이드 화합물층은 10~20㎛의 두께로 균일하게 형성될수 있다.The carbon nitride compound layer may be uniformly formed to a thickness of 10 ~ 20㎛.
상기 원통부와 상기 밸런스웨이트는 구상흑연주철(dutile iron casting) 재질로 형성될 수 있다.The cylindrical portion and the balance weight may be formed of a dutile iron casting material.
이상과 같은 본 발명에 의하면, 스윙링크의 표면 특히, 구동축의 구동핀이 삽입되어 회전지지되는 관통공 내경면 또는 스윙링크의 전체 표면이 질화처리됨에 따라 내마모성, 내식성 등이 향상되어 스크롤압축기의 전체 내구성을 대폭 향상시킬 수 있는 장점이 있다.According to the present invention as described above, as the surface of the swing link, in particular, the inner surface of the through hole in which the driving pin of the drive shaft is inserted and rotated and the entire surface of the swing link is nitrided, wear resistance, corrosion resistance, etc. are improved, so that the entire scroll compressor There is an advantage that can significantly improve the durability.
도 1은 본 발명의 일 실시예에 따른 스크롤압축기용 스윙링크를 도시한 사시도이다.1 is a perspective view illustrating a swing link for a scroll compressor according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 스크롤압축기용 스윙링크의 표면처리방법을 도시한 공정도이다.2 is a process chart showing a surface treatment method of a scroll compressor swing link according to an embodiment of the present invention.
[부호의 설명][Description of the code]
10 스윙링크10 swing links
11 원통부11 cylinder
11a 관통공11a through hole
12 밸런스웨이트12 balance weights
20 구동축20 drive shaft
21 구동핀21 drive pin
이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1에 도시된 바와 같이, 본 발명의 실시예에 따른 스크롤압축기용 스윙링크(10)는 가동스크롤 측에 회전지지되는 원통부(11), 원통부(11)의 일측에 연결된 밸런스웨이트(12)를 포함한다.As shown in FIG. 1, the swing link 10 for a scroll compressor according to an embodiment of the present invention includes a cylindrical portion 11 that is rotatably supported on a movable scroll side and a balance weight 12 connected to one side of the cylindrical portion 11. ).
원통부(11)에는 구동축(20)의 구동핀(21)이 삽입되는 관통공(11a)이 형성되고, 원통부(11)의 외주면은 베어링 등을 통해 가동스크롤 측에 회전가능하게 지지된다.The cylindrical portion 11 is formed with a through hole 11a into which the driving pin 21 of the driving shaft 20 is inserted, and the outer circumferential surface of the cylindrical portion 11 is rotatably supported on the movable scroll side through a bearing or the like.
특히, 원통부(11)의 관통공(11a)은 그 내경면에 구동축(20)의 구동핀(21)이 삽입되어 회전지지됨에 따라 충분한 표면경도를 가짐이 바람직하다.In particular, the through hole 11a of the cylindrical portion 11 preferably has sufficient surface hardness as the driving pin 21 of the drive shaft 20 is inserted into and rotated on the inner diameter surface thereof.
구동핀(21)은 구동축(20)의 중심에서 반경방향으로 편심되게 위치하고, 밸런스웨이트(12)는 원통부(11)의 일측에 일체로 형성되어 있다.The drive pin 21 is radially eccentrically positioned at the center of the drive shaft 20, and the balance weight 12 is integrally formed on one side of the cylindrical portion 11.
본 발명의 실시예에 따른 스윙링크(10)는 그 외면 특히, 스윙링크(10)의 관통공(11a) 내경면이 질화 열처리에 의해 표면처리됨에 따라 내마모성, 내식성 등이 향상되는 장점이 있다. Swing link 10 according to an embodiment of the present invention has the advantage that the wear resistance, corrosion resistance, etc. is improved as the outer surface, in particular, the inner surface of the through hole (11a) of the swing link 10 is surface treated by nitriding heat treatment.
도 2는 본 발명에 의한 스크롤압축기용 스윙링크의 표면처리방법을 도시한 것으로, 응력제거단계(S1), 노말라이징단계(S2), 저온 연질화단계(S3)로 이루어진다.Figure 2 shows a surface treatment method of the swing link for the scroll compressor according to the present invention, comprising a stress removing step (S1), normalizing step (S2), low temperature soft nitriding step (S3).
구상흑연주철(dutile cast iron) 재질로 성형된 스윙링크(10)를 준비한다. 이러한 스윙링크(10)는 앞서 언급한 바와 같이 원통부(11) 및 밸런스웨이트(12)를 가진 형상으로 성형된다.A swing link 10 formed of a dutile cast iron material is prepared. As described above, the swing link 10 is shaped into a shape having a cylindrical portion 11 and a balance weight 12.
응력제거단계(S1)는 스윙링크(10)의 내부 응력을 제거하는 공정으로, 바람직하게는 스윙링크(10)를 480~660℃의 온도에서 120±10분 동안 유지한 후 서서히 냉각시킨다(cooled down slowly).The stress removing step (S1) is a process of removing the internal stress of the swing link 10, and preferably, the swing link 10 is slowly cooled after maintaining the swing link 10 at a temperature of 480˜660 ° C. for 120 ± 10 minutes. down slowly).
노말라이징단계(S2, normalizing)는 응력제거된 스윙링크(10)의 내부조직을 고른 조직으로 만드는 공정으로, 바람직하게는 스윙링크(10)를 820~930℃의 온도에서 180±10분 동안 유지한 후 공랭(air quenching)시킨다.Normalizing step (S2, normalizing) is a process of making the internal structure of the stress-reduced swing link 10 into an even structure, preferably maintaining the swing link 10 at a temperature of 820 ~ 930 ℃ for 180 ± 10 minutes After air quenching.
저온 연질화단계(S3, low-temperature nitro-carburizing)는 스윙링크(10)를 가스 연질화 분위기(gaseous ferritic nitro-carburzing atmosphere)의 연질화로(nitro-carburizing furnace) 내에서 580±10℃의 온도로 300±30분 동안 유지한 후에 260℃ 이하의 비활성 질화로에서 냉각시킨다. 그 후에 스윙링크(10)의 표면에 묻은 잔류물을 세척을 통해 제거한다.The low-temperature nitro-carburizing (S3) step involves swinging the swing link 10 at a temperature of 580 ± 10 ° C. in a nitro-carburizing furnace in a gaseous ferritic nitro-carburzing atmosphere. The furnace is maintained for 300 ± 30 minutes and then cooled in an inert nitriding furnace of 260 ° C or less. Thereafter, the residue on the surface of the swing link 10 is removed by washing.
이러한 저온 연질화처리를 통해, 본 발명에 의한 스윙링크(10)는 그 표면에 카본 나이트라이드 화합물층(epsilon iron carbon-nitride compound layer)이 10~20㎛의 두께로 균일하게 형성되고, 그 표면 경도는 HRC(HK732) 이상이 된다.Through such a low temperature soft nitridation treatment, the swing link 10 according to the present invention is uniformly formed with a thickness of 10-20 μm on the surface of an epsilon iron carbon-nitride compound layer, and its surface hardness. Is greater than or equal to HRC (HK732).
이와 같이, 본 발명은 스윙링크(10)의 표면 특히, 구동축(20)의 구동핀(21)이 삽입되어 회전지지되는 관통공(11a) 내경면 또는 스윙링크(10)의 전체 표면이 질화처리됨에 따라 내마모성, 내식성 등이 향상되어 스크롤압축기의 전체 내구성을 대폭 향상시킬 수 있는 장점이 있다.As described above, in the present invention, the surface of the swing link 10, in particular, the inner surface of the through hole 11a in which the driving pin 21 of the drive shaft 20 is inserted and rotatably supported or the entire surface of the swing link 10 is nitrided. As a result, wear resistance and corrosion resistance are improved, thereby greatly improving the overall durability of the scroll compressor.
본 발명은 스크롤압축기용 스윙링크의 표면처리방법에 관한 것으로 스크롤압축기의 제조에 적용될 수 있어 산업상 이용가능성이 있다.The present invention relates to a method for treating the surface of a swing link for a scroll compressor, which can be applied to the manufacture of a scroll compressor has industrial applicability.

Claims (10)

  1. 원통부 및 밸런스웨이트를 가진 스크롤압축기용 스윙링크의 외면을 표면처리하는 스크롤압축기용 스윙링크의 표면처리방법으로,As a surface treatment method of a scroll compressor swing link for surface treatment of the outer surface of the swing link for the scroll compressor having a cylindrical portion and a balance weight,
    상기 스윙링크의 내부 응력을 제거하는 응력제거단계;A stress removing step of removing an internal stress of the swing link;
    상기 스윙링크의 내부 조직을 고르게 하는 노말라이징단계; 및Normalizing the inner structure of the swing link; And
    상기 스윙링크를 가스 연질화분위기의 연질화로 내에서 일정 시간 동안 방치한 후에 비활성 질화로 내에서 냉각시키는 저온 연질화단계를 포함하는 스크롤압축기용 스윙링크의 표면처리방법.And a low temperature soft nitriding step of allowing the swing link to be cooled in an inert nitriding furnace after being left for a predetermined time in the soft nitriding furnace of the gas soft nitriding atmosphere.
  2. 제1항에 있어서,The method of claim 1,
    상기 응력제거단계는 상기 스윙링크를 480~660℃의 온도에서 120±10분 동안 유지후 서냉시키는 스크롤압축기용 스윙링크의 표면처리방법.The stress relief step is a surface treatment method of a swing compressor for a scroll compressor to slow cooling after maintaining the swing link for 120 ± 10 minutes at a temperature of 480 ~ 660 ℃.
  3. 제1항에 있어서,The method of claim 1,
    상기 노말라이징단계는 상기 스윙링크를 820~930℃의 온도에서 180±10분 동안 유지후 공랭(air quenching)시키는 스크롤압축기용 스윙링크의 표면처리방법.The normalizing step is a surface treatment method of a swing compressor for a scroll compressor to air-quench (air quenching) after maintaining the swing link for 180 ± 10 minutes at a temperature of 820 ~ 930 ℃.
  4. 제1항에 있어서,The method of claim 1,
    상기 저온 연질화단계는 상기 스윙링크를 가스 연질화 분위기의 연질화로 내에서 580±10℃의 온도로 300±30분 동안 유지한 후에 260℃ 이하의 비활성 질화로에서 냉각시키고, 상기 스윙링크의 표면에 묻은 잔류물을 세척을 통해 제거하는 스크롤압축기용 스윙링크의 표면처리방법.In the low temperature soft nitriding step, the swing link is maintained at a temperature of 580 ± 10 ° C. for 300 ± 30 minutes in a soft nitriding furnace of a gas soft nitriding atmosphere, and then cooled in an inert nitriding furnace of 260 ° C. or less, and Surface treatment method of the swing link for the scroll compressor to remove the residue by washing.
  5. 제1항 내지 제4항 중 어느 한 항의 표면처리방법에 의해 형성된 스크롤압축기용 스윙링크로서,A swing linker for a scroll compressor formed by the surface treatment method according to any one of claims 1 to 4,
    가동스크롤 측에 회전지지되는 원통부 및 상기 원통부에 일체로 형성된 밸런스웨이트를 포함하고,It includes a cylindrical portion that is rotatably supported on the movable scroll side and the balance weight formed integrally with the cylindrical portion,
    상기 원통부의 일측에 관통공이 형성되며, 상기 관통공에는 구동축의 구동핀이 회전지지되게 삽입되며,A through hole is formed at one side of the cylindrical portion, and the driving pin of the drive shaft is inserted into the through hole to be rotatably supported.
    상기 스윙링크의 표면에 저온 연질화처리에 의해 카본 나이트라이드 화합물층이 형성되는 스크롤압축기용 스윙링크.And a carbon nitride compound layer formed on the surface of the swing link by low temperature soft nitridation treatment.
  6. 제5항에 있어서,The method of claim 5,
    상기 스윙링크의 표면에 형성된 카본 나이트라이드 화합물층의 경도가 HK732 이상인 스크롤압축기용 스윙링크.And a hardness of the carbon nitride compound layer formed on the surface of the swing link is HK732 or more.
  7. 제5항에 있어서,The method of claim 5,
    상기 카본 나이트라이드 화합물층은 10~20㎛의 두께로 균일하게 형성되는 스크롤 압축기용 스윙링크.The carbon nitride compound layer is a swing link for a scroll compressor is formed uniformly to a thickness of 10 ~ 20㎛.
  8. 가동스크롤 측에 회전지지되는 원통부, 그리고Cylindrical part which is rotatably supported on the movable scroll side, and
    상기 원통부에 일체로 형성되는 밸런스웨이트를 포함하며,It includes a balance weight formed integrally with the cylindrical portion,
    상기 원통부와 상기 밸런스웨이트의 표면에는 응력 제거, 노멀라이징, 및 저온 연질화를 통해서 형성되는 카본 나이트라이드 화합물층이 형성되는 스크롤압축기용 스윙링크.And a carbon nitride compound layer formed on the surface of the cylindrical portion and the balance weight through stress removal, normalizing, and low temperature soft nitriding.
  9. 제8항에 있어서,The method of claim 8,
    상기 카본 나이트라이드 화합물층은 10~20㎛의 두께로 균일하게 형성되는 스크롤압축기용 스윙링크.The carbon nitride compound layer is a scroll compressor swing link is formed uniformly to a thickness of 10 ~ 20㎛.
  10. 제8항에 있어서,The method of claim 8,
    상기 원통부와 상기 밸런스웨이트는 구상흑연주철(dutile cast iron) 재질로 형성되는 스크롤압축기용 스윙링크.The cylindrical portion and the balance weight is a scroll compressor swing link is formed of a dutile cast iron material.
PCT/KR2012/004428 2011-06-10 2012-06-05 Swing link for a scroll compressor and method for treating the surface of same WO2012169763A2 (en)

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