KR20070026947A - Hermetic type compressor - Google Patents

Hermetic type compressor Download PDF

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Publication number
KR20070026947A
KR20070026947A KR1020050079204A KR20050079204A KR20070026947A KR 20070026947 A KR20070026947 A KR 20070026947A KR 1020050079204 A KR1020050079204 A KR 1020050079204A KR 20050079204 A KR20050079204 A KR 20050079204A KR 20070026947 A KR20070026947 A KR 20070026947A
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South Korea
Prior art keywords
oil
journal bearing
rotary shaft
groove
hermetic compressor
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KR1020050079204A
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Korean (ko)
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오일교
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삼성광주전자 주식회사
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Priority to KR1020050079204A priority Critical patent/KR20070026947A/en
Publication of KR20070026947A publication Critical patent/KR20070026947A/en

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    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0261—Hermetic compressors with an auxiliary oil pump
    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/0276—Lubrication characterised by the compressor type the pump being of the reciprocating piston type, e.g. oscillating, free-piston compressors
    • 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
    • F04B39/02—Lubrication
    • F04B39/0284—Constructional details, e.g. reservoirs in the casing
    • F04B39/0292—Lubrication of pistons or cylinders
    • 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
    • F04B39/122—Cylinder block
    • 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
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/02—Lubricating-pumps with reciprocating piston
    • F16N13/06—Actuation of lubricating-pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/40—Movement of component
    • 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
    • F16N—LUBRICATING
    • F16N2210/00—Applications
    • F16N2210/16—Pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)

Abstract

A hermetic compressor is provided to increase the lubrication effect by installing an oil guide mechanism for concentrating oil supply to an outer part of a rotary shaft and inner lower side of a journal bearing. A hermetic compressor includes an oil guide mechanism. The oil guide mechanism contains an oil collecting groove(73) formed along the circumferential direction on the outer side of a journal bearing(70) to open the upper part of an oil collecting groove(73), and at least one oil communicating hole(74) formed to communicate the oil collecting groove and the inner side of the journal bearing by inclined from the underside of the oil collecting groove. A compression chamber for allowing a piston to take straight line reciprocal motion, is installed at one side. The cylinder block having a perforated hole to allow a rotary shaft(50) to pass through is installed in the center of the hermetic compressor. The journal bearing contains a cylindrical body part which allows the outer circumference surface to insert into the perforated hole of the cylindrical block, and a ring shaped flange part(72) which hangs and fixes on the upper side of the cylindrical block. On the outer side of the rotary shaft, the spiral oil groove for allowing oil from the bottom side of the hermetic compressor to be sucked upwards between the journal bearing and the rotary shaft. The outlet of the oil communicating hole is formed lower than the lower end of the oil groove.

Description

밀폐형 압축기 {HERMETIC TYPE COMPRESSOR}Hermetic Compressor {HERMETIC TYPE COMPRESSOR}

도 1은 종래 밀폐형 압축기에 있어서 회전축과 저널베어링의 구조를 발취하여 도시한 단면도로 오일의 유동경로를 나타낸 것이다. Figure 1 shows the flow path of the oil in a cross-sectional view showing the structure of the rotating shaft and the journal bearing in the conventional hermetic compressor.

도 2는 본 발명에 따른 밀폐형 압축기의 전체적인 구조를 도시한 단면도이다. 2 is a cross-sectional view showing the overall structure of a hermetic compressor according to the present invention.

도 3은 본 발명에 따른 밀폐형 압축기에 있어서 회전축과 저널베어링의 구조를 발취하여 도시한 단면도로 오일의 유동경로를 나타낸 것이다. Figure 3 shows the flow path of the oil in a cross-sectional view showing the structure of the rotating shaft and the journal bearing in the hermetic compressor according to the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

13: 오일저장공간 50: 회전축13: oil storage space 50: axis of rotation

51: 편심부 52: 메인축부51: eccentric 52: main shaft

53: 내부오일홀 54: 오일그루브53: inner oil hole 54: oil groove

70: 저널베어링 71: 몸체부70: journal bearing 71: body

72: 플랜지부 73: 오일고임홈72: flange 73: oil gutter groove

74: 오일연통홀74: oil communication hole

본 발명은 밀폐형 압축기에 관한 것으로, 더욱 상세하게는 오일에 의한 회전축의 윤활작용이 보다 효과적으로 수행되도록 마련된 밀폐형 압축기에 관한 것이다. The present invention relates to a hermetic compressor, and more particularly, to a hermetic compressor provided to more effectively perform the lubrication of the rotating shaft by oil.

일반적으로 냉장고나 공기조화기 등의 냉동사이클에 채용되는 압축기는 밀폐용기를 통해 그 외관을 형성하게 되고, 밀폐용기의 내부에는 냉매의 압축구동력을 제공하는 구동유닛과 구동유닛으로부터 전달받은 구동력을 통해 냉매의 압축작용을 수행하는 압축유닛이 실린더블록을 통해 상호 결합되어 있는 구조를 갖는다. In general, a compressor employed in a refrigeration cycle such as a refrigerator or an air conditioner forms an exterior through a sealed container, and inside the sealed container, a driving unit that provides a compression driving force of the refrigerant and a driving force transmitted from the driving unit. Compression units for compressing the refrigerant have a structure in which they are coupled to each other through a cylinder block.

구동유닛은 실린더블록의 상부 외곽 측에 고정되는 고정자 및 고정자와의 전기적인 상호작용으로 회전하도록 고정자 내측에 설치되는 회전자를 구비하며, 회전자에는 구동유닛의 구동력을 압축유닛으로 전달하기 위한 회전축의 상부가 압입된다. The drive unit includes a stator fixed to the upper outer side of the cylinder block and a rotor installed inside the stator to rotate by electrical interaction with the stator. The rotor includes a rotating shaft for transmitting the driving force of the drive unit to the compression unit. The upper part of is pressed in.

실린더블록의 중앙 측에는 상기 회전축이 통과되도록 관통공이 형성되고, 이러한 관통공 측 실린더블록 상면에는 회전축을 회전 가능하게 지지하는 저널베어링이 설치된다. A through hole is formed in the center side of the cylinder block so that the rotating shaft passes, and a journal bearing for rotatably supporting the rotating shaft is installed on the upper surface of the cylinder block.

이 구동유닛의 하측에 마련되는 압축유닛은 실린더블록의 일측의 실린더부에 형성된 압축실과, 압축실 내부에서 직선왕복운동을 하며 냉매를 압축하는 피스톤과, 관통공 하부 측 상기 회전축의 하단에 형성된 편심부와 피스톤 사이를 연결하여 회전축의 회전운동을 직선왕복운동으로 변환하여 피스톤 측으로 전달하는 커넥팅로드를 구비한다. The compression unit provided on the lower side of the drive unit includes a compression chamber formed in the cylinder portion on one side of the cylinder block, a piston for linearly reciprocating movement in the compression chamber and compressing the refrigerant, and a piece formed at the lower end of the rotating shaft under the through hole. A connecting rod is connected between the core and the piston to convert the rotational movement of the rotating shaft into a linear reciprocating motion and to transfer the piston to the piston side.

또 상기 실린더부에는 압축실을 밀폐시키며 내부가 냉매흡입실과 냉매토출실 로 구획된 실린더헤드가 결합되고, 압축실과 실린더헤드 사이에는 냉매흡입실로부터 압축실로 유입되거나 압축실로부터 냉매토출실로 토출되는 냉매의 흐름을 단속하도록 밸브장치가 개재된다.In addition, the cylinder unit seals the compression chamber, and a cylinder head divided into a refrigerant suction chamber and a refrigerant discharge chamber is coupled therein, and a refrigerant flowing into the compression chamber from the refrigerant suction chamber or discharged from the compression chamber into the refrigerant discharge chamber between the compression chamber and the cylinder head. A valve device is interposed to control the flow of water.

이러한 구조를 통해 구동유닛의 작용으로 회전축이 회전하게 되면, 회전축과 커넥팅로드를 통해 연결된 피스톤이 압축실 내부에서 직선왕복운동을 하게 되고, 이에 따라 밀폐용기 외부 측 냉매는 냉매흡입실을 거쳐 상기 압축실로 전달된 후 상기 압축실에서 가압되어 토출되고, 이렇게 압축실에서 토출된 냉매는 상기 냉매토출실을 통해 밀폐용기 외부로 토출되며, 이러한 과정이 반복 진행되며 압축기에 의한 냉매의 압축작용이 이루어진다.When the rotating shaft is rotated by the action of the drive unit through this structure, the piston connected through the rotating shaft and the connecting rod performs a linear reciprocating motion in the compression chamber. Accordingly, the refrigerant outside the sealed container passes through the refrigerant suction chamber. After being delivered to the chamber, it is pressurized and discharged from the compression chamber, and the refrigerant discharged from the compression chamber is discharged to the outside of the sealed container through the refrigerant discharge chamber, and this process is repeated and the refrigerant is compressed by the compressor.

또 밀폐용기의 저부에는 소정량의 오일이 저장되는 오일저장공간이 형성되고, 상기 회전축에는 이러한 오일저장공간의 오일을 상기 회전축과 저널베어링 사이로 공급하여 회전축을 윤활시키기 위한 구조가 마련된다. In addition, an oil storage space for storing a predetermined amount of oil is formed at the bottom of the sealed container, and the rotation shaft is provided with a structure for lubricating the rotation shaft by supplying the oil in the oil storage space between the rotation shaft and the journal bearing.

즉, 종래 밀폐형 압축기에 있어서 회전축과 저널베어링 측 구조를 발취 도시한 도 1을 참고하여 보면, 상기 회전축(1)은 상기 편심부(1a)와, 이 편심부(1a) 상부에 마련되는 것으로 상부 측이 구동유닛의 회전자에 압입되고 하부 측이 상기 저널베어링(2)을 통해 회전 가능하게 지지되는 메인축부(1b)를 구비하는데, 상기 편심부(1a)의 하부에는 하단이 오일저장공간(3)에 잠기도록 마련된 오일픽업부재(4)가 결합되고, 상기 편심부(1a)의 상부와 메인축부(1b)의 하부 사이의 회전축(1) 내측에는 오일픽업부재(4)와 통하도록 내부오일홀(5)이 형성되며, 상기 내부오일홀(5)의 상부 측 상기 메인축부(1b)의 하부 외면에는 내부오일홀(5)과 통하도록 나선 형상으로 마련된 오일그루브(6)가 마련되고, 이러한 오일그루브(6)의 상단은 상기 저널베어링(2)의 상단보다 높게 형성된다. That is, in the conventional hermetic compressor, the rotating shaft and the journal bearing side structure are illustrated with reference to FIG. 1, wherein the rotating shaft 1 is provided above the eccentric portion 1a and the eccentric portion 1a. The side is pressed into the rotor of the drive unit and the lower side has a main shaft portion (1b) rotatably supported through the journal bearing (2), the lower end of the eccentric portion (1a) is an oil storage space ( 3) the oil pick-up member 4 provided to be immersed therein is coupled, and inside the rotary shaft 1 between the upper portion of the eccentric portion 1a and the lower portion of the main shaft portion 1b to communicate with the oil pick-up member 4. An oil hole 5 is formed, and an oil groove 6 provided in a spiral shape to communicate with the inner oil hole 5 is provided on the lower outer surface of the main shaft portion 1b on the upper side of the inner oil hole 5. The upper end of the oil groove 6 is formed higher than the upper end of the journal bearing 2. do.

따라서 압축기의 구동시 상기 회전축(1)이 회전하게 되면, 오일저장공간(3)의 오일은 이러한 회전축(1)의 원심력에 의해 오일픽업부재(4)를 통해 상부로 흡상되고, 이렇게 흡상된 오일은 상기 내부오일홀(5)과 오일그루브(6)를 차례로 경유하게 되며, 이때 상기 오일그루브(6)를 지나는 오일을 통해 회전축(1)과 저널베어링(2) 사이가 윤활된다. Therefore, when the rotating shaft (1) is rotated during the operation of the compressor, the oil in the oil storage space (3) is sucked upward through the oil pickup member (4) by the centrifugal force of the rotating shaft (1), the oil thus sucked up The oil is passed through the inner oil hole (5) and the oil groove (6) in turn, and lubrication between the rotary shaft (1) and the journal bearing (2) through the oil passing through the oil groove (6).

그리고 오일그루브(6)를 지난 오일은 그 자중에 의해 저널베어링(2)의 외면과 실린더블록의 외면을 거쳐 오일저장공간(3)으로 회수된 후 다시 오일픽업부재(4)를 통해 상부로 흡상되면서 회전축(1)과 저널베어링(2) 사이의 윤활작용을 반복적으로 수행하게 된다. The oil passing through the oil groove (6) is recovered to the oil storage space (3) through the outer surface of the journal bearing (2) and the cylinder block by its own weight, and then sucked upward through the oil pickup member (4). While repeating the lubrication between the rotating shaft (1) and the journal bearing (2).

한편, 이와 같이 구동유닛이 상부에 마련되고 압축유닛이 하부에 위치되는 종래 밀폐형 압축기는 냉매의 압축작용시 편심회전하게 되는 상기 편심부(1a)로 인해 저널베어링(2) 하부 측에 대응하는 편심부(1a) 직상부 측 메인축부(1b) 쪽에 다른 부위보다 큰 응력이 집중되므로, 저널베어링(2) 하부 측과 편심부(1a) 직상부 측 메인축부(1b) 사이에 보다 집중적인 오일공급이 이루어지도록 하는 것이 바람직하다. On the other hand, the conventional hermetic compressor, in which the driving unit is provided at the top and the compression unit is located at the lower side, corresponds to the lower side of the journal bearing 2 due to the eccentric portion 1a which is eccentrically rotated when the refrigerant is compressed. Since a greater stress is concentrated on the main shaft portion 1b side directly above the core portion 1a than other portions, more concentrated oil supply is provided between the lower side of the journal bearing 2 and the main shaft portion 1b on the upper side portion of the eccentric portion 1a. It is desirable to make this happen.

그러나 상술한 종래 밀폐형 압축기의 오일공급구조를 통해서는 저널베얼링(2) 하부 측과 편심부(1a) 직상부 측 메인축부(1b) 사이를 집중적으로 윤활시킬 수 없기 때문에, 압축기를 장기간 사용하게 될 경우 편심부(1a) 직상부 측 메인축부 (1b) 외면의 오일유막이 파괴되어 회전축(1)이 마모되는 등 회전축(1)의 효과적인 윤활작용이 어렵게 되는 문제점이 있었으며, 이러한 문제점은 저점도의 오일을 사용하게 될 경우 더욱 두드러지게 나타나게 되어 회전축(1)의 윤활을 위한 오일로서 저점도 오일을 사용할 수 없도록 하는 요인이 되었다. However, since the oil supply structure of the conventional hermetic compressor described above cannot intensively lubricate between the lower side of the journal bearing 2 and the main shaft portion 1b on the side of the eccentric portion 1a, the compressor can be used for a long time. When the oil oil film on the outer surface of the main shaft portion (1b) of the eccentric portion (1a) immediately above is destroyed and the rotating shaft (1) is worn, there is a problem that effective lubrication of the rotating shaft (1) is difficult, such a problem is low viscosity When the oil of the oil becomes more prominent, the oil for lubrication of the rotating shaft (1) was a factor that can not use the low viscosity oil.

본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 이러한 본 발명의 목적은 오일에 의한 회전축의 윤활작용이 보다 효과적으로 수행되도록 마련된 밀폐형 압축기에 관한 것이다.The present invention is to solve such a problem, the object of the present invention relates to a hermetic compressor provided to more effectively perform the lubrication of the rotating shaft by the oil.

이러한 목적을 달성하기 위한 본 발명에 따른 밀폐형 압축기는 피스톤과 커넥팅로드를 통해 연결되는 편심부가 하단에 마련된 회전축과 상기 편심부 상부의 회전축을 회전 가능하게 지지하도록 마련된 저널베어링 사이를 통해 밀폐용기 저면의 오일이 흡상되도록 마련된 밀폐형 압축기에 있어서, 상기 저널베어링에는 상기 회전축과 저널베어링 사이를 거쳐 상기 저널베어링 외면으로 전달된 오일을 상기 저널베어링의 하부 측 내면과 상기 편심부 직상부 측 상기 회전축의 외면 사이로 안내하기 위한 오일안내수단이 마련된 것을 특징으로 한다. The hermetic compressor according to the present invention for achieving the above object is the bottom of the hermetic container through a rotary shaft provided at the lower end connected to the piston and the connecting rod through a journal bearing rotatably supporting the rotary shaft of the upper portion of the eccentric. In a hermetic compressor provided to suck oil, the journal bearing includes oil transferred between the rotary shaft and the journal bearing to the outer surface of the journal bearing between an inner surface of the lower side of the journal bearing and an outer surface of the rotary shaft directly above the eccentric portion. Oil guide means for guiding is characterized in that it is provided.

그리고 상기 오일안내수단은 상기 저널베어링의 외면에 상부가 개방되도록 원주방향을 따라 형성된 오일고임홈과, 상기 오일고임홈과 상기 저널베어링 내면 사이를 연통시키도록 상기 오일고임홈의 저면으로부터 하향 경사지게 마련된 오일연통홀을 포함하는 것을 특징으로 한다. And the oil guide means is provided inclined downward from the bottom surface of the oil chamber groove to communicate between the oil chamber groove formed along the circumferential direction so that the upper portion is opened to the outer surface of the journal bearing, the oil chamber groove and the inner surface of the journal bearing. It characterized in that it comprises an oil communication hole.

또한 본 발명에 따른 밀폐형 압축기는 상기 피스톤이 직선왕복운동하도록 마련된 압축실이 일측에 형성되고 중앙부에는 상기 회전축이 관통하도록 관통공이 형성된 실린더블록을 더 포함하고, 상기 저널베어링은 하단 외주면이 상기 관통공의 내주면에 끼워지도록 마련된 원통형의 몸체부와, 상기 관통공 외측 상기 실린더블록의 상면에 걸려 고정되도록 상기 몸체부 하부 외면에 마련된 링형상의 플랜지부를 포함하며, 상기 오일고임홈은 상기 플랜지부 상면에 마련된 것을 특징으로 한다. In addition, the hermetic compressor according to the present invention further includes a cylinder block having a compression chamber provided at one side thereof so that the piston is linearly reciprocated and having a through hole formed therein so that the rotating shaft passes therethrough, and the journal bearing has a lower outer circumferential surface thereof. And a cylindrical body portion provided to be fitted to an inner circumferential surface of the cylinder, and a ring-shaped flange portion provided on an outer surface of the lower portion of the body portion to be caught and fixed to an upper surface of the cylinder block outside the through hole. Characterized in that provided.

또한 상기 회전축 외면에는 상기 밀폐용기 저면의 오일이 상기 저널베어링과 상기 회전축 사이를 통해 흡상되도록 상기 회전축의 길이방향을 따라 소정구간에 걸쳐 형성되며 상단이 상기 저널베어링보다 높게 마련된 나선형상의 오일그루브가 마련되고, 상기 오일연통홀의 출구는 상기 오일그루브의 하단보다 낮게 마련된 것을 특징으로 한다.In addition, the outer surface of the rotary shaft is formed over a predetermined section along the longitudinal direction of the rotary shaft so that the oil of the bottom surface of the sealed container is drawn between the journal bearing and the rotary shaft, the upper end is provided with a spiral oil groove provided higher than the journal bearing The outlet of the oil communication hole is characterized in that it is provided lower than the lower end of the oil groove.

이하에서는 본 발명에 따른 바람직한 일 실시예를 첨부 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, a preferred embodiment according to the present invention will be described in detail.

본 발명에 따른 밀폐형 압축기는 도 2에 도시된 바와 같이, 일측과 타측에 각각 냉매흡입관(11)과 냉매토출관(12)이 설치된 밀폐용기(10)를 통해 그 외관을 형성하게 되고, 이러한 밀폐용기(10)의 내부에는 냉매의 압축구동력을 제공하는 구동유닛(20)과 구동유닛(20)으로부터 전달받은 구동력을 통해 냉매의 압축작용을 수행하는 압축유닛(30)이 실린더블록(40)을 통해 상호 결합되어 있다. As shown in FIG. 2, the hermetic compressor according to the present invention forms its appearance through a hermetically sealed container 10 in which a refrigerant suction pipe 11 and a refrigerant discharge tube 12 are installed at one side and the other side, respectively. In the container 10, the driving unit 20 providing the compression driving force of the refrigerant and the compression unit 30 performing the compression operation of the refrigerant through the driving force transmitted from the driving unit 20 are provided with the cylinder block 40. Are mutually coupled.

이중 구동유닛(20)은 실린더블록(40)의 상부 측에 설치되는 것으로 실린더블 록(40)의 외곽 상부 측에 고정되는 고정자(21)와, 고정자(21)와의 전기적인 상호 작용으로 회전하도록 고정자(21) 내측에 마련되는 회전자(22)을 구비하며, 회전자(22)의 중앙부에는 구동유닛(20)의 구동력을 압축유닛(30)으로 전달하기 위한 회전축(50)의 상부가 압입된다.The dual drive unit 20 is installed on the upper side of the cylinder block 40 and rotated by electrical interaction with the stator 21 and the stator 21 fixed to the outer upper side of the cylinder block 40. The rotor 22 is provided inside the stator 21, and the upper portion of the rotating shaft 50 for transmitting the driving force of the driving unit 20 to the compression unit 30 is press-fitted in the center portion of the rotor 22. do.

실린더블록(40)의 중앙 측에는 상기 회전축(50)이 통과되도록 관통공(41)이 형성되는데, 상기 회전축(50)은 이러한 관통공(41) 하부 측에 위치되는 후술하게 될 편심부(51)와, 편심부(51) 상부의 메인축부(52)를 포함하여 구성되며, 메인축부(52)의 상부를 통해 회전자(22)에 압입된다. The through hole 41 is formed at the central side of the cylinder block 40 so that the rotating shaft 50 passes, and the rotating shaft 50 is an eccentric portion 51 to be described later located at the lower side of the through hole 41. And a main shaft portion 52 above the eccentric portion 51, and is pressed into the rotor 22 through the upper portion of the main shaft portion 52.

또 메인축부(52)의 하부 외측에는 회전축(50)을 회전 가능하게 지지하도록 마련된 저널베어링(70)이 설치되며, 이러한 저널베어링(70)은 하단 외주면이 관통공(41)의 내주면에 끼워지도록 마련된 원통형의 몸체부(71)와, 관통공(41) 주변 실린더블록(40)의 상면에 걸리도록 몸체부(71) 하부 외면에 마련되는 링형상의 플랜지부(72)를 포함하여 구성된다. 이 저널베어링은 플랜지부(72)가 고정볼트를 통해 실린더블록(40)에 결합됨으로써 실린더블록(40)에 고정된다. In addition, the lower outer side of the main shaft portion 52 is provided with a journal bearing 70 rotatably supporting the rotation shaft 50, such a journal bearing 70 so that the lower outer peripheral surface is fitted to the inner peripheral surface of the through hole 41. The cylindrical body portion 71 is provided, and a ring-shaped flange portion 72 provided on the outer surface of the lower portion of the body portion 71 so as to be caught by the upper surface of the cylinder block 40 around the through hole 41. The journal bearing is fixed to the cylinder block 40 by the flange portion 72 is coupled to the cylinder block 40 through the fixing bolt.

구동유닛(20)의 하측에 마련되는 압축유닛(30)은 실린더블록(40) 일측의 실린더부(42)에 형성된 압축실(31)과, 압축실(31) 내부에서 직선왕복운동을 하며 냉매를 압축하는 피스톤(32)과, 관통공(41) 하부 측 상기 회전축(50)의 하단에 형성되는 편심부(51)와 피스톤(32) 사이를 연결하여 회전축(50)의 회전운동을 직선왕복운동으로 변환하여 피스톤(32) 측으로 전달하는 커넥팅로드(33)를 구비한다. The compression unit 30 provided on the lower side of the drive unit 20 has a compression chamber 31 formed in the cylinder portion 42 on one side of the cylinder block 40 and a linear reciprocating motion in the compression chamber 31. Connecting the piston 32 and the eccentric portion 51 formed at the lower end of the rotating shaft 50 and the piston 32 at the lower side of the through hole 41 to linearly reciprocate the rotational movement of the rotating shaft 50. It is provided with a connecting rod 33 which converts the motion to the piston 32 side.

또 상기 실린더부(42)에는 압축실(31)을 밀폐시키며 내부가 냉매흡입실(34a) 과 냉매토출실(34b)로 구획된 실린더헤드(34)가 결합되고, 압축실(31)과 실린더헤드(34) 사이에는 냉매흡입실(34a)로부터 압축실(31)로 유입되거나 압축실(31)로부터 냉매토출실(34b)로 토출되는 냉매의 흐름을 단속하도록 밸브장치(35)가 개재된다.In addition, the cylinder section 42 seals the compression chamber 31, and a cylinder head 34 divided into a refrigerant suction chamber 34a and a refrigerant discharge chamber 34b is coupled to the cylinder 42, and the compression chamber 31 and the cylinder are coupled to each other. The valve device 35 is interposed between the heads 34 so as to control the flow of the refrigerant flowing into the compression chamber 31 from the refrigerant suction chamber 34a or discharged from the compression chamber 31 to the refrigerant discharge chamber 34b. .

이러한 구조를 통해 구동유닛(20)의 고정자(21)와 회전자(22) 간의 전기적인 상호작용으로 회전자(22)와 함께 회전축(50)이 회전하게 되면, 회전축(50)과 커넥팅로드(33)를 통해 연결된 피스톤(32)이 압축실(31) 내부에서 직선왕복운동을 하게 되고, 이에 따라 밀폐용기(10) 외부 측 냉매는 냉매흡입관(11)과 냉매흡입실(34a)을 거쳐 상기 압축실(31)로 전달된 후 상기 압축실(31)에서 압축되어 토출되고, 이렇게 압축실(31)에서 토출된 냉매는 상기 냉매토출실(34b)과 냉매토출관(12)을 통해 밀폐용기(10) 외부로 토출되며, 이러한 과정이 반복 진행되며 압축기에 의한 냉매의 압축작용이 이루어진다.Through this structure, when the rotating shaft 50 rotates together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22 of the driving unit 20, the rotating shaft 50 and the connecting rod ( The piston 32 connected through 33 performs a linear reciprocating motion in the compression chamber 31. Accordingly, the refrigerant outside the sealed container 10 passes through the refrigerant suction pipe 11 and the refrigerant suction chamber 34a. After delivered to the compression chamber 31 is compressed and discharged in the compression chamber 31, the refrigerant discharged in the compression chamber 31 is sealed through the refrigerant discharge chamber 34b and the refrigerant discharge pipe (12). (10) discharged to the outside, this process is repeated repeatedly and the compression of the refrigerant by the compressor is performed.

또한, 도 3을 함께 참고하면, 상기 밀폐용기(10)의 저부에는 소정량의 오일이 저장되는 오일저장공간(13)이 형성되고, 상기 회전축(50)에는 이러한 오일저장공간(13)의 오일을 회전축(50)과 저널베어링(70) 사이로 공급하여 회전축(50)과 저널베어링(70) 사이를 윤활시키기 위한 오일공급구조가 마련된다. In addition, referring to FIG. 3, an oil storage space 13 for storing a predetermined amount of oil is formed at a bottom of the sealed container 10, and the oil of the oil storage space 13 is formed at the rotation shaft 50. Is supplied between the rotary shaft 50 and the journal bearing 70 to provide an oil supply structure for lubricating between the rotary shaft 50 and the journal bearing 70.

즉, 먼저 상기 편심부(51)의 하부에는 하단이 오일저장공간(13)에 잠기도록 마련된 오일픽업부재(80)가 결합되고, 상기 편심부(51)의 상부와 메인축부(52)의 하부 사이의 회전축(50) 내측에는 오일픽업부재(80)와 통하도록 내부오일홀(53)이 형성되며, 상기 내부오일홀(53)의 상부 측 상기 메인축부(52)의 외면에는 내부오일 홀(53)과 통하도록 회전축(50)의 길이방향을 따라 나선형상으로 마련된 오일그루브(54)가 마련되고, 이러한 오일그루브(54)의 상단은 상기 저널베어링(70)의 상단보다 높게 형성된다. That is, first, the lower portion of the eccentric portion 51 is coupled to the oil pick-up member 80 is provided so that the lower end is locked in the oil storage space 13, the upper portion of the eccentric portion 51 and the lower portion of the main shaft portion 52 An inner oil hole 53 is formed inside the rotating shaft 50 to communicate with the oil pick-up member 80, and an inner oil hole is formed on an outer surface of the main shaft part 52 on the upper side of the inner oil hole 53. 53 is provided with an oil groove 54 spirally provided along the longitudinal direction of the rotation shaft 50, the upper end of the oil groove 54 is formed higher than the upper end of the journal bearing (70).

따라서 압축기의 구동시 상기 회전축(50)이 회전하게 되면, 오일저장공간(13)의 오일은 이러한 회전축(50)의 원심력에 의해 오일픽업부재(80)를 통해 상부로 흡상되고, 이렇게 흡상된 오일은 상기 내부오일홀(53)을 거쳐 상기 오일그루브(54)를 경유하는 과정에서 회전축(50)과 저널베어링(70) 사이를 윤활시키게 된다. Therefore, when the rotary shaft 50 is rotated during the operation of the compressor, the oil in the oil storage space 13 is sucked upward through the oil pickup member 80 by the centrifugal force of the rotary shaft 50, so the oil is sucked up Is lubricated between the rotating shaft 50 and the journal bearing 70 in the process of passing through the oil groove 54 via the inner oil hole (53).

그리고 오일그루브(54)를 지난 오일은 그 자중에 의해 일단 저널베어링(70)의 외면으로 안내되는데, 본 발명에 따른 밀폐형 압축기에는 이처럼 상기 오일그루브(54)로부터 저널베어링(70)의 외면으로 전달된 오일을 저널베어링(70)의 하부 측 내면과 편심부(51) 직상부 측 메인축부(52) 외면 사이로 안내하기 위한 오일안내수단이 마련된다. The oil passing through the oil groove 54 is guided to the outer surface of the journal bearing 70 by its own weight. The hermetic compressor according to the present invention is thus transferred from the oil groove 54 to the outer surface of the journal bearing 70. Oil guide means for guiding the oil between the lower side inner surface of the journal bearing 70 and the outer surface of the main shaft portion 52 immediately above the eccentric portion 51 is provided.

이러한 오일안내수단은 구동유닛(20)이 상부에 마련되고 압축유닛(30)이 하부에 위치됨에 따라 편심부(51)에 인접하게 되는 편심부(51) 직상부 측 메인축부(52)에 다른 부위보다 큰 응력이 집중되는 본 발명에 따른 밀폐형 압축기의 특성을 감안한 것으로, 이처럼 응력이 집중되는 편심부(51) 직상부 측 메인축부(52) 외면과 저널베어링(70) 하부 내면 사이로 집중적인 오일공급이 이루어지도록 하여 오일에 의한 회전축(50)과 저널베어링(70) 사이의 윤활작용을 향상시키기 위한 것이며, 본 실시예에 있어서 이러한 오일안내수단은 저널베어링(70)의 플랜지부(72) 상면에 원주방향을 따라 형성되는 링형상의 오일고임홈(73)과, 오일고임홈(73)과 저널베어 링(70)의 내면 사이를 연통시키도록 오일고임홈(73)의 저면으로부터 하향 경사지게 마련된 오일연통홀(74)을 통해 구성된다.The oil guiding means is different from the main shaft portion 52 immediately above the eccentric portion 51 which is adjacent to the eccentric portion 51 as the driving unit 20 is provided at the upper portion and the compression unit 30 is located at the lower portion. In consideration of the characteristics of the hermetic compressor according to the present invention in which a greater stress than the part is concentrated, the oil concentrates between the outer surface of the main shaft portion 52 directly above the eccentric portion 51 and the lower inner surface of the journal bearing 70 where the stress is concentrated. This is to improve the lubrication between the rotating shaft 50 and the journal bearing 70 by the oil to be supplied, in this embodiment the oil guide means is the upper surface of the flange portion 72 of the journal bearing 70 It is provided to be inclined downward from the bottom of the oil chamber groove 73 so as to communicate between the ring-shaped oil chamber groove 73 and the oil chamber groove 73 and the inner surface of the journal bearing ring 70 formed in the circumferential direction. Through the oil communication hole (74) It is composed.

따라서 상기 오일그루브(54)를 통과하면서 하부 측 메인축부(52)와 저널베어링(70) 사이를 윤활시킨 후 저널베어링(70) 외면으로 전달된 오일은 저널베어링(70)의 몸체부(71)의 측면을 따라 하부로 이동하다가 저널베어링(70)의 플랜지부(72) 상면에 형성된 오일고임홈(73)에 고이게 되고, 오일고임홈(73)에 고인 오일은 계속해서 상기 오일연통홀(74)을 따라 응력이 집중되는 편심부(51) 직상부 측 메인축부(52) 외면과 저널베어링(70) 하부 내면 사이로 안내되어 이들 사이를 집중적으로 윤활시키게 된다.Therefore, the oil transferred to the outer surface of the journal bearing 70 after lubricating between the lower main shaft portion 52 and the journal bearing 70 while passing through the oil groove 54 is the body portion 71 of the journal bearing 70. While moving downward along the side of the oil bearing grooves 73 formed in the upper surface of the flange portion 72 of the journal bearing 70, the oil accumulated in the oil pool groove 73 continues the oil communication hole 74 ) Is guided between the outer surface of the main shaft portion 52 directly above the eccentric portion 51 where the stress is concentrated and the lower inner surface of the journal bearing 70 to intensively lubricate them.

여기서 상기 오일연통홀(74)은 하나만 형성되어도 가능하며, 오일고임홈(73)의 형성방향을 따라 상호 이격된 복수개로 형성되어도 무방하다.Here, only one oil communication hole 74 may be formed, and a plurality of oil communication holes 74 may be formed to be spaced apart from each other along the forming direction of the oil pool groove 73.

또 이러한 오일안내수단이 구비된 상태에서는 오일저장공간(13)에 수용되는 오일로서 저점도의 오일을 사용하게 되더라도 응력이 집중되는 편심부(51) 직상부 측 메인축부(52) 외면의 오일유막이 파손될 우려가 없게 되어 점도가 다소 떨어지는 저점도의 오일로도 회전축(50)의 효과적인 윤활작용을 수행할 수 있게 된다.In addition, when the oil guide means is provided, the oil film on the outer surface of the main shaft portion 52 directly above the eccentric portion 51 where stress is concentrated even when a low viscosity oil is used as the oil contained in the oil storage space 13. There is no fear of breakage, so that even with a low viscosity oil having a somewhat lower viscosity, effective lubrication of the rotating shaft 50 can be performed.

또한 상기 저널베어링(70)의 내면에 형성되는 오일연통홀(74)의 출구는 상기 오일그루브(54)의 하단보다 낮게 마련되는 것이 바람직한데, 이는 오일연통홀(74)의 출구가 오일그루브(54)의 하단보다 높게 위치될 경우에는 오일연통홀(74)을 따라 하부로 안내되는 오일의 흐름이 오일그루브(54)를 따라 상부로 안내되는 오일에 의해 방해받을 수 있으므로 이를 방지하기 위한 것이다.In addition, the outlet of the oil communication hole 74 formed on the inner surface of the journal bearing 70 is preferably provided lower than the lower end of the oil groove 54, which is the outlet of the oil communication hole 74 is an oil groove ( If the position is higher than the lower end of 54) is to prevent the flow of the oil is guided to the lower portion along the oil communication hole 74 may be hindered by the oil is guided to the upper portion along the oil groove (54).

그리고 오일연통홀(74)을 통해 편심부(51) 직상부의 메인축부(52)와 저널베어링(70)의 하부 내면 사이로 안내된 오일은 계속해서 편심부(51)의 외면을 따라 오일저장공간(13)으로 회수된 후 다시 오일픽업부재(80)를 통해 상부로 흡상되면서 회전축(50)의 윤활작용을 반복적으로 수행하게 된다.The oil guided between the main shaft portion 52 directly above the eccentric portion 51 and the lower inner surface of the journal bearing 70 through the oil communication hole 74 continues along the outer surface of the eccentric portion 51. After being recovered to 13, the oil is sucked upward through the oil pick-up member 80 to repeatedly perform the lubrication of the rotating shaft 50.

이상에서 상세히 설명한 바와, 본 발명에 따른 밀폐형 압축기는 상기 오일안내수단을 통해 응력이 집중되는 편심부 직상부 측 회전축의 외면과 저널베어링 하부 내면 사이로 집중적인 오일의 공급이 가능하게 되어 오일에 의한 회전축의 윤활작용을 보다 효과적으로 수행할 수 있게 되는 이점을 갖는다.As described above in detail, the hermetic compressor according to the present invention enables the concentrated oil to be supplied between the outer surface of the rotary shaft directly above the eccentric portion and the lower inner surface of the journal bearing through which the oil is guided so that the stress is concentrated. It has the advantage of being able to perform the lubrication effect more effectively.

Claims (4)

피스톤과 커넥팅로드를 통해 연결되는 편심부가 하단에 마련된 회전축과 상기 편심부 상부의 회전축을 회전 가능하게 지지하도록 마련된 저널베어링 사이를 통해 밀폐용기 저면의 오일이 흡상되도록 마련된 밀폐형 압축기에 있어서,In a hermetic compressor provided to suck oil from the bottom of a sealed container through a eccentric portion connected through a piston and a connecting rod between a rotary shaft provided at a lower end and a journal bearing provided to rotatably support a rotary shaft of an upper portion of the eccentric. 상기 저널베어링에는 상기 회전축과 저널베어링 사이를 거쳐 상기 저널베어링 외면으로 전달된 오일을 상기 저널베어링의 하부 측 내면과 상기 편심부 직상부 측 상기 회전축의 외면 사이로 안내하기 위한 오일안내수단이 마련된 것을 특징으로 하는 밀폐형 압축기.The journal bearing is provided with an oil guide means for guiding the oil transferred to the outer surface of the journal bearing between the rotating shaft and the journal bearing between the inner side of the lower side of the journal bearing and the outer surface of the rotating shaft directly above the eccentric portion. Hermetic compressor. 제 1항에 있어서, The method of claim 1, 상기 오일안내수단은 상기 저널베어링의 외면에 상부가 개방되도록 원주방향을 따라 형성된 오일고임홈과, 상기 오일고임홈과 상기 저널베어링 내면 사이를 연통시키도록 상기 오일고임홈의 저면으로부터 하향 경사지게 마련된 적어도 하나의 오일연통홀을 포함하는 것을 특징으로 하는 밀폐형 압축기. The oil guide means is at least provided to be inclined downward from the bottom surface of the oil chamber groove to communicate between the oil chamber groove formed in the circumferential direction so that the upper portion is opened to the outer surface of the journal bearing, and the oil chamber groove and the inner surface of the journal bearing. A hermetic compressor comprising one oil communication hole. 제 2항에 있어서, The method of claim 2, 상기 피스톤이 직선왕복운동하도록 마련된 압축실이 일측에 형성되고, 중앙부에는 상기 회전축이 관통하도록 관통공이 형성된 실린더블록을 더 포함하고, The piston is formed on one side of the compression chamber provided for linear reciprocating movement, the central portion further comprises a cylinder block formed with a through hole to penetrate the rotating shaft, 상기 저널베어링은 하단 외주면이 상기 관통공의 내주면에 끼워지도록 마련 된 원통형의 몸체부와, 상기 관통공 외측 상기 실린더블록의 상면에 걸려 고정되도록 상기 몸체부 하부 외면에 마련된 링형상의 플랜지부를 포함하며, The journal bearing includes a cylindrical body portion having a lower outer circumferential surface fitted to the inner circumferential surface of the through hole, and a ring-shaped flange portion provided on an outer surface of the lower portion of the body portion so as to be caught and fixed to an upper surface of the cylinder block outside the through hole. , 상기 오일고임홈은 상기 플랜지부 상면에 마련된 것을 특징으로 하는 밀폐형 압축기.The oil compression groove is sealed compressor, characterized in that provided on the upper surface of the flange portion. 제 1항에 있어서,The method of claim 1, 상기 회전축 외면에는 상기 밀폐용기 저면의 오일이 상기 저널베어링과 상기 회전축 사이를 통해 흡상되도록 상기 회전축의 길이방향을 따라 소정구간에 걸쳐 형성되며 상단이 상기 저널베어링보다 높게 마련된 나선형상의 오일그루브가 마련되고,The outer surface of the rotary shaft is formed over a predetermined section along the longitudinal direction of the rotary shaft so that the oil of the bottom surface of the sealed container is drawn between the journal bearing and the rotary shaft, the upper end is provided with a spiral oil groove provided higher than the journal bearing , 상기 오일연통홀의 출구는 상기 오일그루브의 하단보다 낮게 마련된 것을 특징으로 하는 밀폐형 압축기.The outlet of the oil communication hole is a hermetic compressor characterized in that it is provided lower than the lower end of the oil groove.
KR1020050079204A 2005-08-29 2005-08-29 Hermetic type compressor KR20070026947A (en)

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