KR0152824B1 - Method for manufacturing vane of a closing type rotary compressor - Google Patents
Method for manufacturing vane of a closing type rotary compressorInfo
- Publication number
- KR0152824B1 KR0152824B1 KR1019950019277A KR19950019277A KR0152824B1 KR 0152824 B1 KR0152824 B1 KR 0152824B1 KR 1019950019277 A KR1019950019277 A KR 1019950019277A KR 19950019277 A KR19950019277 A KR 19950019277A KR 0152824 B1 KR0152824 B1 KR 0152824B1
- Authority
- KR
- South Korea
- Prior art keywords
- vane
- compressor
- rotary compressor
- wear
- roller
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/92—Surface treatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/16—Wear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
본 발명은 밀폐형 회전식 압축기의 베인 제조방법에 관한 것으로, 종래 압축기에서 습동재는 압축기의 고성능화에 수반되는 부하의 증대나 윤활성이 낮은 R407C의 사용에 의해 베인의 선단부와 상대재인 롤러의 외주부에 응착마모가 발생하여 압축기의 내구성을 유지하는 것이 문제가되고 있는 바, 산질화처리된 베인과 Mo-Ni-Cr 주철로 된 롤러를 포함하는 회전식 압축기에 있어서, 상기 베인의 산질화처리 조건을 NH350%, 공기 10%, N240%와 가스조성의 분위기 중에서 570℃±l0℃로 2시간 산질화처리함을 특징으로 하는 본 발명 밀폐형 회전식 압축기의 베인 제조방법을 제공하여 부하가 극심한 압축기나, 냉매 R407C를 사용하는 압축기에 대해 베인과 롤러의 응착마모를 방지하는 동시에 베인과 롤러의 마모량을 억제하는 습동재의 사양을 개발하여 압축기의 내구성을 향상시키도록 한 것이다.The present invention relates to a vane manufacturing method of a hermetic rotary compressor. In the conventional compressor, the sliding material adheres to the tip of the vane and to the outer circumference of the roller as a counterpart by the use of R407C having a low lubrication or an increase in load accompanying high performance of the compressor. the generated in the rotary compressor comprising a roller as it is bar, oxidizing and nitriding treatment of the vane and Mo-Ni-Cr cast iron, which problem of maintaining the durability of the compressor, the oxidizing and nitriding treatment conditions of the vane NH 3 50 Compressor having a heavy load by providing a vane manufacturing method of the hermetic rotary compressor of the present invention, characterized by oxynitriding at 570 ° C. ± 10 ° C. for 2 hours in an atmosphere of%, air 10%, N 2 40%, and gas composition. For the compressor using the refrigerant R407C, we developed the sliding material specification to prevent the wear of the vanes and rollers while preventing the adhesion of vanes and rollers. It will have to improve its configuration.
Description
제1도는 일간적인 밀폐형 회전식 압축기의 습동부 횡단면도.1 is a sliding cross-sectional view of the daily hermetic rotary compressor.
제2도는 베인의 형상도.2 is a shape of the vane.
제3도는 종래의 베인재의 하나인 고속도공구강(SKH 51)의 조성상태도.3 is a composition diagram of a high speed coating steel (SKH 51) which is one of the conventional vane material.
제4도는 본 발명에 의한 베인이 적용된 압축기의 마모량 실험 상태도.4 is a state of wear experiment of the vane applied compressor according to the present invention.
제5도는 본 발명 일실시예에 의한 베인 및 롤러와 종래의 베인 및 롤러의 마모량 비교그래프.Figure 5 is a graph of the amount of wear of the vanes and rollers and vanes and rollers according to an embodiment of the present invention.
발명은 밀폐형 회전식 압축기의 베인에 관한 것으로, 특히 베인을 NH350%, 공기 10 %, N240%와 가스조성의 분위기 중에서 570℃±10℃로 2시간 산질화처리하여 롤러와의 마모를 저감하도록 한 밀폐형 회전식 압축기의 베인 제조방법에 관한 것이다.The present invention relates to vanes of a hermetic rotary compressor, and in particular, the vanes are oxynitrated at 570 ° C. ± 10 ° C. for 2 hours in an atmosphere of NH 3 50%, air 10%, N 2 40% and gas composition to prevent wear with the roller. The vane manufacturing method of the hermetic rotary compressor to reduce.
일반적으로 밀폐형 회전식 압축기의 습동부는 제1도에 도시한 바와 같이, 압축기의 구동시 롤러가 실린더의 내주면과 베인의 선단면이 접촉되면서 회전되어 흡입구를 통해 유입된 냉매가스를 압축하여 토출구로 토출된다. 이때 베인은 용수철에 의해 지지되면서 왕복운동을 하게 된다.In general, the sliding part of the hermetic rotary compressor is rotated while the roller is in contact with the inner circumferential surface of the cylinder and the tip surface of the vane when the compressor is driven, thereby compressing the refrigerant gas introduced through the suction port and discharging it to the discharge port. do. At this time, the vane is reciprocated while being supported by the spring.
이와 같은 습동부의 습동조건인 베인과 롤러의 접촉부는 내구성을 유지하기 위하여 베인은 경도 HV 800∼850의 고속도 공구강(SKH 51)을 사용하고, 롤러는 경도 HV 500∼ 550의 주철을 사용해 왔다. 제2도 및 제3도에 도시한 바와 같이, 상기 베인은 선단부나 측면부에 재질차가 없는 균일한 재료로 되어 있다.In order to maintain the durability of the vane, which is the sliding condition of the sliding part, the vane uses high-speed tool steel (SKH 51) having a hardness of HV 800 to 850 and cast iron having a hardness of HV 500 to 550. As shown in Figs. 2 and 3, the vanes are made of a uniform material with no material difference between the tip and side portions.
상기한 바와 같은 습동재 사양에 있어서는 압축기의 고성능화에 수반되는 부하의 증대나 윤활성이 낮은 R407C의 사용에 의해 베인의 선단부와 상대재인 롤러의 외주부에 응착마모가 발생하여 압축기의 내구성을 유지하는 것이 문제가 되고 있다.In the sliding material specification as described above, it is a problem to maintain the durability of the compressor due to adhesion wear on the tip of the vane and the outer circumference of the roller, which is the counterpart, due to the increase in load accompanying the high performance of the compressor and the use of R407C having low lubricity. It is becoming.
이와 같은 문제점을 해소하기 위하여 베인의 선단부에 세라믹 코팅을 행하는 방법이 제안되고 있는 바, 특히 응착마모를 방지하기 위해서는 융점이 높은 비철계의 재료가 유효하다. 그러나 이러한 비철계의 재료는 베인의 전체 혹은 용사 등의 방법으로 베인의 일부를 세라믹 재료로 형성하는 경우에 세라믹 부분의 정밀 연삭 가공에 시간이 많이 소요되므로 양산화에 적합치 않은 문제가 있다.In order to solve such a problem, a method of applying a ceramic coating on the tip of the vane has been proposed. In particular, a non-ferrous material having a high melting point is effective to prevent adhesion wear. However, such a nonferrous material has a problem in that it is not suitable for mass production because it takes a long time for precision grinding processing of the ceramic part when forming a part of the vane with a ceramic material by the method of the whole vane or thermal spraying.
한편 철계 재료를 모재로서 CVD법에 의해 세락믹재료를 화학증착시키는 경우에는 피막의 두께가 정밀하게 제어되기 위해서 후가공이 필요하게 되고, 모재와의 경도차가 커지거나, 밀착성이 악화되기 때문에 베인의 선단부와 같이 국부적으로 큰 하중이 걸리는 조건에서는 세라믹 피막의 깨짐이나 박리가 발생되기 쉬운 문제가 있다. 또한 이러한 세라믹 피막은 경도 HV 2000이상의 고경도강이기 때문에 피막 자신의 내마모성이 우수한 반면에, 습접하는 상대재인 롤러의 외주면의 마모량비 증대되는 것이다.On the other hand, when the ceramic material is chemically deposited by the CVD method using an iron-based material as a base material, post-processing is required in order to precisely control the thickness of the film, and the hardness difference with the base material increases, or the adhesiveness deteriorates, so that the tip of the vane In such a condition that a large load is applied locally, there is a problem that cracking or peeling of the ceramic film is likely to occur. In addition, since the ceramic coating is a high hardness steel having a hardness of HV 2000 or more, the coating itself is excellent in wear resistance, while the wear amount ratio of the outer circumferential surface of the roller, which is a wet relative material, is increased.
상기한 바와 같은 문제점을 감안하여 안출한 본 발명의 목적은 부하가 극심한 압축기나, 냉매 R407C를 사용하는 압축기에 대해 베인과 롤러의 응착마모를 방지하는 동시에 베인과 롤러의 마모량을 억제하는 습동재의 사양을 개발하여 압축기의 내구성을 향상시키려는 것이다.An object of the present invention devised in view of the above-described problems is to provide a sliding material that prevents abrasion wear of vanes and rollers and suppresses abrasion of vanes and rollers for a compressor with a heavy load or a compressor using refrigerant R407C. The specification is developed to improve the durability of the compressor.
이러한 본 발명의 목적을 달성하기 위하여 산질화처리된 베인과 Mo-Ni-Cr 주철로된 롤러를 포함하는 밀폐형 회전식 압축기에 있어서, 상기 베인의 산질화처리 조건을 NH350%, 공기 10%, N240%와 가스조성의 분위기 중에서 570℃±10℃로 2시간 처리 함을 특징으로 하는 밀폐형 회전식 압축기의 베인 제조방법이 제공된다.In order to achieve the object of the present invention, in a sealed rotary compressor including an oxynitride vane and a roller made of Mo-Ni-Cr cast iron, the oxynitridation conditions of the vane are NH 3 50%, air 10%, Provided is a vane manufacturing method of a hermetic rotary compressor, which is treated at 570 ° C. ± 10 ° C. for 2 hours in an atmosphere of N 2 40% and gas composition.
이하, 상기한 바와 같은 본 발명을 첨부도면에 도시한 일 실시예에 의거하여 보다 상세히 설명한다.Hereinafter, the present invention as described above will be described in more detail based on one embodiment shown in the accompanying drawings.
본 발명에 의한 밀폐형 회전식 압축기에서 베인은 표면에 적절한 표면처리를 행하고, 롤러를 Mo-Ni-Cr 합금주철을 택하여 마모량이 적은 쪽으로 선택한 것을 특징으로 한다.In the hermetic rotary compressor according to the present invention, the vanes are subjected to proper surface treatment on the surface, and the roller is selected by Mo-Ni-Cr alloy cast iron so as to have less wear.
즉, 상기 베인의 표면에는 산질화처리를 하여 롤러의 마모를 억제하는 동시에 응착마모를 방지하도록 한다. 이러한 산질화처리는 종래의 가스질화 분위기인 NH3혹은 NH3+N2혼합가스 분위기에 공기, 산소 또는 수증기를 첨가하여 질화와 산화를 동시에 행하는 표면 개질 기술의 일종으로서 베인의 표면에 질소와 산소를 동시에 확산/침투시켜 화합물층을 형성함으로써 고온에서 재료의 내마모성 및 내소착성을 향상시키고, 상기 화합물층 하부의 질소가 고용된 확산층이 재료의 표면에 압축응력을 향상시켜 내피로강도 등을 현저히 증가시키게 된다.That is, the surface of the vane is subjected to oxynitriding so as to suppress wear of the roller and prevent adhesion wear. This oxynitride treatment is a type of surface modification technology that simultaneously nitrates and oxidizes by adding air, oxygen, or water vapor to an NH 3 or NH 3 + N 2 mixed gas atmosphere, which is a conventional gas-nitriding atmosphere. By simultaneously diffusing / penetrating the compound layer to improve the wear resistance and adhesion resistance of the material at high temperature, and the diffusion layer containing nitrogen in the lower part of the compound layer improves the compressive stress on the surface of the material to significantly increase the fatigue strength and the like. do.
본 발명에서는 베인의 표면에 가장 적합한 조건을 설정하기 위하여 공기의 함량을 9~11%, 14~16%, 24∼26%, 45%로 변화시킨 후, 570℃±10℃에서 2시간 처리하였다. 공기의 함량이 증가함에 따라 산화물충과 화합물층의 두께가 커지는 반면에 기공층이 커져 마모에 악영향을 끼치므로, 공기의 함량을 9~11%의 범위로 하여 열처리를 실시하였다.In the present invention, the air content was changed to 9-11%, 14-16%, 24-26%, and 45% in order to set the most suitable condition on the surface of the vane, and then treated at 570 ° C ± 10 ° C for 2 hours. . As the content of air increases, the thickness of the oxide layer and the compound layer increases, while the pore layer increases, which adversely affects wear. Thus, heat treatment was performed with the air content in the range of 9-11%.
따라서 본 발명의 일실시예에 의한 산질화처리 조건은 NH350%, 공기 10%, N240% 가스조성의 분위기에서 모재를 고속도 공구강인 SKH 51을 사용하여 확산층이 약 60μ정도로 HV 1150∼1250를 나타내었다. 또한 이 확산층의 X선분석 결파는 대부분이 Fe3O4와 ε-Fe4N으로 구성되어 있었다.Therefore, the oxynitride treatment conditions according to the embodiment of the present invention are based on the high-temperature tool steel SKH 51 in the atmosphere of NH 3 50%, air 10%, N 2 40% gas composition, the diffusion layer is about 60μ HV 1150 ~ 1250 is shown. In addition, the X-ray analysis of the diffusion layer was mainly composed of Fe 3 O 4 and ε-Fe4N.
이와 같이 산질화처리한 베인재와 Mo-Ni-Cr주철을 조합한 롤러재를 사용한 본 발명의 압축기와 종래 SKH 51을 사용한 베인재와 Mo-Ni-Cr주철을 조합한 롤러재를 사용한 압축기와의 마모량을 비교한 실험결과치를 제5도에 도시하였다. 이 실험에서의 마모조건은 하중이 100㎏, 윤활유가 에스테르 오일, 오일온도가 80℃, 롤러재의 회전속도를 500 R.P.M, 마모시간을 5시간으로 설정한 것으로, 제4도는 마모 실험 상태도이다. 도면중 7은 에스테르 오일, 8은 용기, 9와 10은 본 발명에 의한 베인재와 롤러재, P는 나중을 나타낸 것이다.The compressor of the present invention using the roller material combining the oxynitride vane material and the Mo-Ni-Cr cast iron, the compressor using the vane material using the conventional SKH 51 and the roller material combining the Mo-Ni-Cr cast iron, Fig. 5 shows the experimental results for comparing the amount of wear. The wear conditions in this experiment were 100 kg load, lubricating oil ester oil, oil temperature 80 ° C, rotational speed of roller material was set at 500 R.P.M and wear time was 5 hours, and FIG. 4 is a wear test state diagram. In the figure, 7 is ester oil, 8 is a container, 9 and 10 are vane material and roller material according to the present invention, P is the latter.
실험결과에서 알 수 있듯이, 본 발명에 의한 압축기가 종래의 기술에서보다 베인재의 경우 약 5배 가량 마모량이 적게 발생되었고, 동일한 롤러재를 사용하였음에도 불구하고 본 발명의 압축기가 훨씬 적은 마모량을 보이고 있다. 이는 베인재를 산화처리하여 경도 HV 800∼850에서 HV 1150∼1250로 증가시킴으로써 상대적으로 마모량이 줄어 들었고, 또한 이 표면처리로 인해 마찰계수가 저감되어 상대재인 롤러재의 마모량이 줄어든 것이다.As can be seen from the experimental results, the compressor according to the present invention produced about 5 times less wear in the case of the vane material than in the prior art, and the compressor of the present invention showed much less wear in spite of using the same roller material. have. This is because the vane material is oxidized to increase the hardness from HV 800 to 850 to HV 1150 to 1250, thereby reducing the amount of wear. In addition, the surface treatment reduces the friction coefficient, thereby reducing the amount of wear of the roller material.
이상에서 설명한 바와 같이, 본 발명에 의한 밀폐형 회전식 압축기의 베인 제조방법에 의해 베인을 산질화 처리함으로써 베인의 마모량이 감소됨과 아울러 상대재인 롤러의 마모량도 저감되는 효과가 있다.As described above, by the oxynitridation of the vanes by the vane manufacturing method of the hermetic rotary compressor according to the present invention, the amount of wear of the vanes is reduced and the amount of wear of the roller, which is a counterpart, is also reduced.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950019277A KR0152824B1 (en) | 1995-07-03 | 1995-07-03 | Method for manufacturing vane of a closing type rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950019277A KR0152824B1 (en) | 1995-07-03 | 1995-07-03 | Method for manufacturing vane of a closing type rotary compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970006914A KR970006914A (en) | 1997-02-21 |
| KR0152824B1 true KR0152824B1 (en) | 1998-11-02 |
Family
ID=19419608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950019277A KR0152824B1 (en) | 1995-07-03 | 1995-07-03 | Method for manufacturing vane of a closing type rotary compressor |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0152824B1 (en) |
-
1995
- 1995-07-03 KR KR1019950019277A patent/KR0152824B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR970006914A (en) | 1997-02-21 |
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