KR20080096235A - Hermetic type compressor - Google Patents

Hermetic type compressor Download PDF

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Publication number
KR20080096235A
KR20080096235A KR1020070041427A KR20070041427A KR20080096235A KR 20080096235 A KR20080096235 A KR 20080096235A KR 1020070041427 A KR1020070041427 A KR 1020070041427A KR 20070041427 A KR20070041427 A KR 20070041427A KR 20080096235 A KR20080096235 A KR 20080096235A
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South Korea
Prior art keywords
oil
piston
storage groove
piston pin
eccentric shaft
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KR1020070041427A
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Korean (ko)
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정용연
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삼성광주전자 주식회사
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Priority to KR1020070041427A priority Critical patent/KR20080096235A/en
Publication of KR20080096235A publication Critical patent/KR20080096235A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • F04B39/0005—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
    • F04B39/0022—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 piston rods
    • 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
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • 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
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • F04B39/0253—Hermetic compressors with oil distribution channels in the rotating shaft using centrifugal force for transporting the oil
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • 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
    • 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
    • Y10S417/902—Hermetically sealed motor pump unit

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)

Abstract

A hermetic type compressor is provided to perform effectively lubrication between a connecting rod and a piston pin. A hermetic type compressor comprises a rotary shaft(40) equipped with an oil path dispersing oil into the upper part of an eccentric shaft and on upper part of which an eccentric axis part is formed; a piston(22) reciprocating inside a cylinder; a connecting rod(23) equipped with a small diameter part fitted into the piston, connecting the eccentric axis part and the piston in order to convert eccentric rotary motion of the eccentric axis part into linear motion of a piston; and a piston pin(24) connected to the piston in order to be fitted into the inner diameter of the small diameter part.

Description

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

도 1은 본 발명의 바람직한 일 실시예에 따른 밀폐형 압축기의 전체적인 구조를 도시한 단면도이다. 1 is a cross-sectional view showing the overall structure of a hermetic compressor according to an embodiment of the present invention.

도 2는 본 발명의 바람직한 일 실시예에 따른 밀폐형 압축기에 있어서, 피스톤핀 쪽 구조를 분해 도시한 사시도이다. 2 is an exploded perspective view of the piston pin side structure in the hermetic compressor according to the preferred embodiment of the present invention.

도 3은 본 발명의 바람직한 일 실시에에 따른 밀폐형 압축기에 있어서, 피스톤핀 쪽 구조를 발췌하여 도시한 단면도이다. 3 is a cross-sectional view showing an extract of the piston pin side in the hermetic compressor according to the preferred embodiment of the present invention.

도 4는 도 3에서 피스톤핀 쪽을 확대도시한 단면도로, 피스톤핀의 오일저장홈으로부터 피스톤핀과 커넥팅로드의 소경부 내경 사이로 오일이 공급되는 동작상태를 나타낸 것이다. FIG. 4 is an enlarged cross-sectional view of the piston pin in FIG. 3 and illustrates an operation state in which oil is supplied between the piston pin and the inner diameter of the small diameter portion of the connecting rod from the oil storage groove of the piston pin.

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

21: 실린더 22: 피스톤21: cylinder 22: piston

23: 커넥팅로드 23b: 소경부23: connecting rod 23b: small diameter part

24: 피스톤핀 24b: 오일저장홈24: piston pin 24b: oil storage groove

24c: 오일공급홀 41: 편심축부24c: oil supply hole 41: eccentric shaft

43: 오일유로43: oil euro

본 발명은 밀폐형 압축기에 관한 것으로, 더욱 상세하게는 커넥팅로드와 피스톤핀 사이의 윤활작용을 보다 효과적으로 수행할 수 있도록 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 a lubrication action between the connecting rod and the piston pin.

일반적으로 밀폐형 압축기는 냉매의 압축동력을 제공하는 구동유닛과, 구동유닛의 구동력을 전달받아 냉매의 압축작용을 수행하는 압축유닛을 포함하며, 이러한 구동유닛과 압축유닛은 프레임을 통해 밀폐용기 내부에 설치된다.In general, the hermetic compressor includes a driving unit providing a compression power of the refrigerant, and a compression unit receiving the driving power of the driving unit to perform the compression operation of the refrigerant. The driving unit and the compression unit are connected to the inside of the hermetic container through a frame. Is installed.

압축유닛은 프레임의 상부 일측에 내부공간이 압축실을 형성하도록 마련된 실린더와, 압축실 내부에서 직선왕복운동하도록 마련된 피스톤 등을 구비하며, 구동유닛의 구동력은 회전축을 통해 압축유닛으로 전달된다. The compression unit has a cylinder provided on the upper side of the frame to form a compression chamber, and a piston provided to linearly reciprocate in the compression chamber, and the driving force of the drive unit is transmitted to the compression unit through the rotating shaft.

회전축은 프레임 중앙에 형성된 관통부에 회전 가능하도록 체결되는데, 회전축의 하부는 상기 구동유닛의 회전자에 압입되어 회전자의 회전시 함께 회전하게 되고, 프레임 상부로 연장된 회전축의 상단은 편심회전하는 편심축부를 형성하게 되며, 이러한 편심축부와 피스톤 사이에는 편심축부의 편심회전운동을 피스톤의 직선왕복운동으로 전환시키기 위한 커넥팅로드가 설치된다. The rotating shaft is rotatably fastened to a through part formed in the center of the frame, and the lower portion of the rotating shaft is pressed into the rotor of the drive unit to rotate together with the rotation of the rotor, and the upper end of the rotating shaft extending to the upper portion of the frame is eccentrically rotated. An eccentric shaft is formed, and a connecting rod is installed between the eccentric shaft and the piston to convert the eccentric rotation of the eccentric shaft into a linear reciprocating motion of the piston.

커넥팅로드는 상기 편심축부에 연결되는 일단의 대경부와, 상기 피스톤과 연결되도록 타단에 마련된 소경부를 구비한다. 상기 소경부는 피스톤 내부로 삽입되고, 이 상태에서 피스톤에는 피스톤핀이 체결되며, 피스톤과 커넥팅로드는 이러한 피스톤핀이 상기 소경부 내경에 삽입됨에 따라 상호 연결된다. The connecting rod has one large diameter part connected to the eccentric shaft part and a small diameter part provided at the other end to be connected to the piston. The small diameter part is inserted into the piston, and in this state, the piston pin is fastened to the piston, and the piston and the connecting rod are interconnected as the piston pin is inserted into the small diameter part inner diameter.

이러한 구조를 통해 상기 구동유닛의 구동으로 회전축이 회전하게 되면, 편심축부와 커넥팅로드를 통해 연결된 피스톤이 압축실 내부에서 직선왕복운동하며 냉매의 압축작용을 수행하게 되는 것이다. When the rotating shaft is rotated by the driving unit through this structure, the piston connected through the eccentric shaft portion and the connecting rod is a linear reciprocating motion in the compression chamber to perform the compression action of the refrigerant.

또한, 밀폐용기의 저부에는 소정량의 오일이 저장된 오일저장공간이 형성되고, 상기 회전축에는 상기 회전축의 원심력에 의해 오일저장공간의 오일이 회전축과 프레임 사이를 경유하여 편심축부 상부로 비산시키는 오일유로가 형성된다. In addition, an oil storage space in which a predetermined amount of oil is stored is formed at the bottom of the sealed container, and an oil flow path in which the oil in the oil storage space is scattered to the upper portion of the eccentric shaft via the rotation shaft and the frame by the centrifugal force of the rotation shaft. Is formed.

따라서 프레임과 회전축 사이는 오일유로를 경유하여 상부로 흡상되는 오일을 통해 윤활되고, 커넥팅로드와 피스톤핀 사이 등 상기 실린더 쪽 압축유닛의 습동부는 회전축의 상단으로 분사되어 비산되는 오일을 통해 윤활된다.Therefore, between the frame and the rotating shaft is lubricated through the oil drawn up through the oil flow path, the sliding portion of the compression unit such as the connecting rod and the piston pin is lubricated through the oil sprayed to the upper end of the rotating shaft. .

그러나 이와 같이 오일에 의한 압축유닛 쪽 윤활작용이 상기 편심축부 상부로 비산되는 오일에 의해 간접적으로 이루어지는 종래 밀폐형 압축기에서는 상기 소경부 내경과 피스톤핀 외경 사이와 같이 마찰 및 마모가 급격하게 이루어지는 부위를 오일을 통해 효과적으로 윤활시키는데 한계가 있었다. However, in the conventional hermetic compressor, in which the lubrication action toward the compression unit by the oil is indirectly caused by the oil scattered on the eccentric shaft portion, the oil and the portion where friction and abrasion are abruptly occurred, such as between the inner diameter of the small diameter portion and the outer diameter of the piston pin. There was a limit to the effective lubrication through.

본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 이러한 본 발명의 목적은 커넥팅로드와 피스톤핀 사이의 윤활작용을 보다 효과적으로 수행할 수 있도록 마련된 밀폐형 압축기를 제공하는 것이다.The present invention is to solve such a problem, it is an object of the present invention to provide a hermetic compressor provided to more effectively perform the lubrication between the connecting rod and the piston pin.

이러한 목적을 달성하기 위한 본 발명에 따른 밀폐형 압축기는 상단에 편심축부가 형성되고 상기 편심축부 상부로 오일을 비산시키는 오일유로를 구비하는 회전축과, 실린더 내부에 직선왕복운동 가능하도록 피스톤과, 상기 편심축부의 편심회전운동을 상기 피스톤의 직선왕복운동으로 전환시키도록 상기 편심축부와 피스톤 사이를 연결하며 상기 피스톤 내부로 삽입되는 소경부를 구비하는 커넥팅로드와, 상기 커넥팅로드와 상기 피스톤 사이의 결합을 위해 상기 소경부 내경에 삽입되도록 상기 피스톤에 체결되는 피스톤핀을 구비하며, 상기 피스톤핀은 상기 편심축부 상부로부터 비산된 오일을 내부에 저장하도록 상부로 개방된 오일저장홈과, 상기 오일저장홈에 저장된 오일을 상기 피스톤핀 외면과 상기 소경부 내경 사이로 공급하도록 상기 오일저장홈과 상기 피스톤핀 외면 사이를 연통시키는 오일공급홀을 포함하는 것을 특징으로 한다. The hermetic compressor according to the present invention for achieving the above object is a rotary shaft having an eccentric shaft portion at the top and having an oil flow path for scattering oil on the eccentric shaft portion, a piston to enable a linear reciprocating motion inside the cylinder, and the eccentricity. A connecting rod having a small diameter portion connected between the eccentric shaft portion and the piston and inserted into the piston to convert the eccentric rotational movement of the shaft into a linear reciprocating motion of the piston, for coupling between the connecting rod and the piston And a piston pin fastened to the piston to be inserted into the small diameter inner diameter, wherein the piston pin has an oil storage groove open to the top to store oil scattered from an upper portion of the eccentric shaft portion and stored in the oil storage groove. The oil to supply oil between the piston pin outer surface and the small diameter inner diameter. It characterized in that it comprises an oil supply hole for communicating between the storage groove and the outer surface of the piston pin.

그리고 상기 오일공급홀은 하부 쪽 상기 오일저장홈과 연통되고, 상기 오일저장홈과 수직으로 교차하도록 마련된 것을 특징으로 한다. And the oil supply hole is in communication with the lower oil storage groove, characterized in that it is provided to intersect the oil storage groove vertically.

또한 상기 오일공급홀은 상호 일직선형태로 배열된 한 쌍으로 마련된 것을 특징으로 한다. In addition, the oil supply hole is characterized in that provided in a pair arranged in a straight line with each other.

이하에서는 본 발명에 따른 바람직한 실시 예를 첨부 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 실시예에 따른 밀폐형 압축기는 도 1에 도시된 바와 같이, 상부용기(1a)와 하부용기(1b)가 상호 결합되어 형성되는 밀폐용기(1)를 통해 외관을 이루게 되 고, 밀폐용기(1)의 일측과 타측에는 밀폐용기(1) 내부로의 냉매유입을 안내하는 흡입관(1c)과, 밀폐용기(1) 내부에서 압축된 냉매를 밀폐용기(1) 외부로 안내하는 토출관(1d)이 각각 설치된다. As shown in FIG. 1, the hermetic compressor according to the present embodiment forms an appearance through the hermetic container 1 formed by combining the upper container 1a and the lower container 1b with each other, and the hermetically sealed container 1. On one side and the other side of the suction tube (1c) for guiding the refrigerant flow into the sealed container (1), and the discharge pipe (1d) for guiding the refrigerant compressed in the sealed container (1) outside the sealed container (1) These are each installed.

밀폐용기(1)의 내부에는 냉매의 압축동력을 제공하는 구동유닛(10)과, 구동유닛(10)의 구동력을 전달받아 냉매의 압축작용을 수행하는 압축유닛(20)이 설치되며, 이러한 구동유닛(10)과 압축유닛(20)은 프레임(30)을 통해 설치된다. Inside the hermetic container 1, a driving unit 10 for providing the compression power of the refrigerant and a compression unit 20 for receiving the driving force of the driving unit 10 to perform the compression action of the refrigerant are installed. The unit 10 and the compression unit 20 are installed through the frame 30.

먼저 구동유닛(10)은 프레임(30) 하부 외곽 측에 고정되는 고정자(11)와, 고정자(11)와의 전자기적인 상호 작용으로 회전하도록 고정자(11) 내측에 마련되는 회전자(12)를 구비하고, 이러한 구동유닛(10)의 구동력이 압축유닛(20)으로 전달되도록 프레임(30)과 회전자(12)의 중심에는 회전축(40)이 관통되도록 설치된다.First, the driving unit 10 includes a stator 11 fixed to the lower outer side of the frame 30 and a rotor 12 provided inside the stator 11 to rotate by electromagnetic interaction with the stator 11. And, the driving force of the drive unit 10 is installed so that the rotation shaft 40 penetrates the center of the frame 30 and the rotor 12 so that the driving force is transmitted to the compression unit 20.

회전자(12) 내측 회전축(40)은 회전자(12) 중심에 압입되어 회전자(12)의 회전시 회전축(40)과 함께 회전하게 되고, 프레임(30)의 중앙에는 회전축(40)이 회전 가능하게 지지되도록 관통부(31)가 형성된다. 여기서 프레임(30) 상부로 연장되는 회전축(40)의 상단은 편심회전하는 편심축부(41)를 형성하게 된다. The inner rotating shaft 40 of the rotor 12 is pressed into the center of the rotor 12 to rotate together with the rotating shaft 40 when the rotor 12 rotates, the center of the frame 30 is the rotating shaft 40 The through part 31 is formed to be rotatably supported. Here, the upper end of the rotating shaft 40 extending above the frame 30 forms an eccentric shaft portion 41 for eccentric rotation.

그리고 압축유닛(20)은 편심축부(41) 외측 프레임(30)의 상부에 프레임(30)과 일체로 형성되는 것으로 내부공간이 압축실(21a)을 형성하는 실린더(21)와, 압축실(21a) 내부에서 직선왕복운동하도록 마련된 피스톤(22)을 구비한다.In addition, the compression unit 20 is formed integrally with the frame 30 on the eccentric shaft 41, the outer frame 30, the cylinder 21, the inner space forming the compression chamber 21a, and the compression chamber ( 21a) is provided with a piston 22 provided to linearly reciprocate.

여기서 상기 피스톤(22)과 편심축부(41) 사이에는 커넥팅로드(23)가 연결되어 편심축부(41)의 편심회전운동이 피스톤(22)의 직선왕복운동으로 전환되도록 한다. Here, the connecting rod 23 is connected between the piston 22 and the eccentric shaft portion 41 so that the eccentric rotation of the eccentric shaft portion 41 is converted into a linear reciprocating movement of the piston 22.

커낵팅로드(4)는 편심축부(41) 외주에 회전가능하게 체결되는 일단의 대경부(23a)와, 피스톤(22)에 체결되는 피스톤핀(24) 외주에 체결되도록 조립되는 타단의 소경부(23b)를 구비한다.The connecting rod 4 has a large diameter portion 23a of one end rotatably fastened to the outer circumference of the eccentric shaft portion 41 and a small diameter portion of the other end assembled to be fastened to the outer circumference of the piston pin 24 fastened to the piston 22. 23b is provided.

상기 피스톤(22)에는 상기 소경부(23b)가 삽입되도록 후방쪽으로 개구된 삽입홈(22a)이 형성되고 삽입홈(22a) 상부와 하부의 피스톤(22)에는 피스톤핀(24)의 체결을 위해 상하방향으로 형성된 체결홀(22b,22c)이 마련된다. 따라서 커넥팅로드(23)의 소경부(23b)를 삽입홈(22a) 내부로 삽입시킨 상태에서 상기 체결홀(22b,22c)과 소경부(23b) 내경에 체결되도록 피스톤핀(24)을 피스톤(22)에 체결하게 되면, 커넥팅로드(23)의 소경부(23b)가 피스톤핀(24) 외주에 회전 가능하게 체결된다. The piston 22 is formed with an insertion groove 22a open to the rear to insert the small diameter portion 23b, and for fastening the piston pin 24 to the upper and lower pistons 22 of the insertion groove 22a. Fastening holes 22b and 22c formed in the vertical direction are provided. Accordingly, the piston pin 24 is connected to the piston pin 24 so as to be engaged with the fastening holes 22b and 22c and the inner diameter of the small diameter portion 23b while the small diameter portion 23b of the connecting rod 23 is inserted into the insertion groove 22a. 22, the small diameter portion 23b of the connecting rod 23 is rotatably fastened to the outer circumference of the piston pin 24.

또 이 상태에서는 피스톤핀(22)이 상하방향으로 이탈될 우려가 있으므로, 상기 피스톤핀(24)은 고정핀(25)을 통해 상기 피스톤(22)에 회전이 방지되도록 고정된다. In addition, in this state, there is a possibility that the piston pin 22 is separated in the vertical direction, the piston pin 24 is fixed to the piston 22 through the fixing pin 25 to prevent rotation.

고정핀(25)의 체결을 위해 상기 삽입홈(22a) 상부의 피스톤(22)과 피스톤핀(24)의 상부 측벽에는 피스톤핀(22)의 길이방향과 수직으로 교차되는 방향으로 각각 제1고정홀(22d)과 제2고정홀(24a)이 형성되고, 상기 고정핀(25)은 이러한 제1고정홀(22d)과 제2고정홀(24a)이 일치되도록 한 상태에서 제1고정홀(22d)과 제2고정홀(24a)에 압입방식으로 체결된다. In order to fasten the fixing pin 25, the first side surfaces of the piston 22 and the upper sidewalls of the piston pin 24 are respectively fixed in the direction perpendicular to the longitudinal direction of the piston pin 22. A hole 22d and a second fixing hole 24a are formed, and the fixing pin 25 has a first fixing hole in a state in which the first fixing hole 22d and the second fixing hole 24a are aligned with each other. 22d) and the second fixing hole 24a are fastened in a press-fit manner.

또 압축실(21a)을 밀폐시키도록 피스톤(22)의 전진방향 측 실린더(21)의 단부에는 냉매흡입실(26a)과 냉매토출실(26b)이 상호 구획되도록 마련된 실린더헤 드(26)가 결합된다. 이중 상기 냉매흡입실(26a)은 상기 흡입관(1c)을 통해 밀폐용기(1) 내부로 유입된 냉매를 전달받아 압축실(21a)로 공급하고, 냉매토출실(26b)은 압축실(21a)에서 압축된 냉매를 전달받아 상기 토출관(1d) 측으로 안내하며, 실린더(21)와 실린더헤드(26) 사이에는 냉매흡입실(26a)로부터 압축실(21a)로 흡입되거나 압축실(21a)로부터 냉매토출실(26b)로 토출되는 냉매의 흐름을 단속하는 밸브장치(27)가 개재된다.At the end of the cylinder 21 in the forward direction of the piston 22 to seal the compression chamber 21a, a cylinder head 26 provided so that the refrigerant suction chamber 26a and the refrigerant discharge chamber 26b are mutually divided is provided. Combined. The refrigerant suction chamber 26a receives the refrigerant introduced into the sealed container 1 through the suction pipe 1c and supplies the refrigerant to the compression chamber 21a, and the refrigerant discharge chamber 26b is the compression chamber 21a. Receives the refrigerant compressed into the discharge pipe 1d, and is sucked into the compression chamber 21a from the refrigerant suction chamber 26a or from the compression chamber 21a between the cylinder 21 and the cylinder head 26. The valve device 27 which interrupts the flow of the refrigerant discharged to the refrigerant discharge chamber 26b is interposed.

이러한 구조를 통해 고정자(11)와 회전자(12)의 전자기적인 상호 작용으로 회전자(12)와 함께 회전축(40)이 회전하게 되면, 편심축부(41)와 커넥팅로드(23)를 통해 연결된 피스톤(22)이 압축실(21a) 내부에서 직선왕복운동하며 냉매의 압축작용을 수행하게 된다.Through this structure, when the rotating shaft 40 rotates together with the rotor 12 by the electromagnetic interaction between the stator 11 and the rotor 12, the eccentric shaft portion 41 and the connecting rod 23 are connected. The piston 22 linearly reciprocates in the compression chamber 21a to perform a compression action of the refrigerant.

또한, 밀폐용기(1)의 저부에는 소정량의 오일이 저장된 오일저장공간(1e)이 형성되고, 회전축(40)에는 상기 회전축(40)의 원심력에 의해 오일저장공간(1e)의 오일이 회전축(40)과 프레임(30) 관통부(31) 사이를 경유하여 편심축부(41) 상부로 분사되도록 안내하는 오일유로(43)가 형성된다.In addition, the bottom of the sealed container (1) is formed with an oil storage space (1e) in which a predetermined amount of oil is stored, the oil in the oil storage space (1e) of the oil storage space (1e) by the centrifugal force of the rotary shaft 40 in the rotary shaft 40 An oil passage 43 is formed to guide the upper portion of the eccentric shaft portion 41 via the portion 40 and the penetrating portion 31 of the frame 30.

이러한 오일유로(43)는 회전축(40)의 하부 내측에 형성되는 하부오일홀(43a)과, 프레임(30)의 중공부(31)와 대응하는 부위의 회전축(40) 외면에 나선형성으로 마련되고 하단이 하부오일홀(43a)과 통하도록 형성된 오일그루브(43b)와, 오일그루브(43b)의 상단으로부터 다시 회전축(40) 내부를 통해 편심축부(41)의 상단까지 연장되도록 형성된 상부오일홀(43c)을 포함하여 구성된다. The oil channel 43 is provided in a spiral shape on the lower oil hole 43a formed inside the lower portion of the rotating shaft 40 and the outer surface of the rotating shaft 40 at a portion corresponding to the hollow portion 31 of the frame 30. And an oil groove 43b formed so that the lower portion communicates with the lower oil hole 43a, and an upper oil hole formed so as to extend from the upper end of the oil groove 43b to the upper end of the eccentric shaft part 41 through the inside of the rotation shaft 40 again. And 43c.

또 회전축(40)의 하단에는 회전축(40)의 회전에 따른 원심력을 이용하여 오 일저장공간(1e)의 오일을 상기 오일유로(43)로 픽업시키기 위한 오일픽업부재(51)가 압입되고, 오일픽업부재(51)의 내부에는 오일픽업날개(52)가 설치된다. In addition, an oil pick-up member 51 is press-fitted at the lower end of the rotary shaft 40 to pick up oil in the oil storage space 1e to the oil channel 43 by using centrifugal force according to the rotation of the rotary shaft 40. An oil pick-up blade 52 is installed inside the oil pick-up member 51.

이러한 구성을 통해 냉매의 압축작용에 따른 회전축(40)의 회전시 오일저장공간(1e)의 오일은 회전축(40)의 원심력에 의해 오일픽업부재(51)를 거쳐 하부오일홀(43a)로 전달된 후 다시 오일그루브(43b)로 공급되어 회전축(40)과 프레임(30)의 관통부(31) 사이를 지나면서 이들 사이를 윤활시키고, 오일그루브(43b)를 거친 오일은 계속해서 상부오일홀(43c)을 통해 편심축부(41) 상부로 안내된다.Through this configuration, the oil in the oil storage space 1e when the rotary shaft 40 rotates according to the compression action of the refrigerant is transferred to the lower oil hole 43a via the oil pickup member 51 by the centrifugal force of the rotary shaft 40. After being fed back to the oil groove 43b, the oil is lubricated between the rotating shaft 40 and the penetrating portion 31 of the frame 30, and the oil passing through the oil groove 43b continues to be the upper oil hole. It is guided to the upper portion of the eccentric shaft portion 41 through 43c.

한편, 이러한 오일공급 구조에서는 오일에 의한 압축유닛(20) 쪽 윤활작용이 편심축부(41) 상부로 비산되는 오일을 통해 간접적으로 이루어지기 때문에, 상기 커넥팅로드(23)의 소경부(23b)와 상기 피스톤핀(24) 사이와 같이 극심한 마찰과 마모가 발생하는 부위에 충분한 량의 오일을 공급할 수 없게 될 우려가 있다. On the other hand, in such an oil supply structure, since the lubrication action toward the compression unit 20 by oil is indirectly made through oil scattered to the eccentric shaft portion 41, the small diameter portion 23b of the connecting rod 23 and There is a fear that a sufficient amount of oil may not be supplied to a site where excessive friction and wear occur, such as between the piston pins 24.

따라서 이를 방지하기 위해 본 실시예에 따른 밀폐형 압축기에 있어서, 상기 피스톤핀(24)에는 상기 편심축부(41) 상부로 비산된 오일 중 일부를 내부에 일시 수용하도록 상부로 개방된 오일저장홈(24b)과, 상기 오일저장홈(24b)에 저장된 오일을 상기 피스톤핀(24) 외면과 상기 소경부(23b) 내경 사이로 공급하도록 상기 오일저장홈(24b)과 상기 피스톤핀(24) 외면 사이를 연통시키는 오일공급홀(24c)이 마련되며, 이러한 오일공급홀(24c)은 오일저장홈(24b)의 하부 쪽과 연통된다. Therefore, in order to prevent this, in the hermetic compressor according to the present embodiment, the piston pin 24 has an oil storage groove 24b open to the upper part to temporarily receive some of the oil scattered above the eccentric shaft portion 41 therein. And the oil storage groove 24b and the piston pin 24 outer surface to supply oil stored in the oil storage groove 24b between the piston pin 24 outer surface and the small diameter portion 23b inner diameter. The oil supply hole 24c is provided, and the oil supply hole 24c communicates with the lower side of the oil storage groove 24b.

상기 피스톤핀(24)은 상부로 개방된 상기 오일저장홈(24b)이 내부에 형성되도록 상부가 중공으로 형성되고, 오일저장홈(24b) 하부 쪽 피스톤핀(24)은 내부가 막혀 있는 구조를 취하게 된다. The piston pin 24 has a hollow upper portion so that the oil storage groove 24b opened to the upper side is formed therein, and the piston pin 24 at the lower side of the oil storage groove 24b has a structure in which the inside is blocked. Get drunk.

따라서 도 3에 도시된 바와 같이 이러한 오일저장홈(24b)을 통해 상기 편심축부(41) 상부로 비산되는 오일 중 상기 피스톤핀(24) 쪽을 향하여 비산되는 오일은 상기 오일저장홈(24b)에 일시 저장될 수 있게 되며, 상기 실린더(21) 상부로 비산된 오일 중 일부도 실린더(21) 외면을 따라 하부로 이동하는 과정에서 상기 오일저장홈(24b) 내부에 수용되게 된다. Therefore, as shown in FIG. 3, the oil scattered toward the piston pin 24 among the oil scattered toward the eccentric shaft 41 through the oil storage groove 24b is disposed in the oil storage groove 24b. The oil may be temporarily stored, and some of the oil scattered to the upper portion of the cylinder 21 may be accommodated in the oil storage groove 24b in the process of moving downward along the outer surface of the cylinder 21.

또 상기 오일공급홀(24c)의 경우 피스톤핀(24) 외면 쪽 일단이 상기 오일저장홈(24b) 쪽 타단에 비해 높게 형성되면, 오일저장홈(24b) 내부 오일이 피스톤핀(24) 외경과 소경부(23b) 내경 사이로 원활하게 유출되지 못할 우려가 있고, 반대로 피스톤핀(24) 외면 쪽 일단이 오일저장홈(24b) 쪽 타단에 비해 낮게 형성될 경우에는 오일저장홈(24b) 내부로 유입된 오일이 피스톤핀(24) 외경과 소경부(23b) 내경 사이로 너무 신속하게 유출되면서 오일저장홈(24b) 내부에 오일저장이 어려울 우려가 있다. 따라서 이를 고려했을 때 상기 오일공급홀(24c)은 도 4에 도시된 바와 같이, 상기 오일저장홈(24b)과 수직으로 교차하도록 마련되어 상기 오일저장홈(24b)에 충분한 량의 오일이 저장될 수 있도록 하면서, 오일저장홈(24b)에 저장된 오일이 상기 소경부(23b)의 내경과 피스톤핀(24)의 외경 사이로 적정량씩 지속적으로 공급될 수 있도록 마련되는 것이 바람직하다. In addition, in the case of the oil supply hole 24c, when one end of the outer surface of the piston pin 24 is formed higher than the other end of the oil storage groove 24b, the oil inside the oil storage groove 24b and the outer diameter of the piston pin 24 There is a risk that the small diameter portion (23b) may not flow smoothly between the inner diameter, on the contrary, when one end of the outer surface of the piston pin 24 is formed lower than the other end of the oil storage groove (24b) side flows into the oil storage groove (24b) As the oil leaks out too quickly between the outer diameter of the piston pin 24 and the inner diameter of the small diameter portion 23b, it is difficult to store the oil inside the oil storage groove 24b. Therefore, in consideration of this, as shown in FIG. 4, the oil supply hole 24c is vertically intersected with the oil storage groove 24b so that a sufficient amount of oil may be stored in the oil storage groove 24b. While the oil is stored in the oil storage groove 24b, it is preferable that the oil stored in the oil storage groove 24b is continuously provided at an appropriate amount between the inner diameter of the small diameter portion 23b and the outer diameter of the piston pin 24.

또한 본 실시예에 있어서, 상기 오일공급홀(24c)은 한 쌍으로 마련되고, 이러한 한 쌍의 오일공급홀(24c)은 상호 일직선형태를 이루도록 배열된다. 따라서 상기 한 쌍의 오일공급홀(24c)은 오일저장홈(24b)이 가공된 상태에서 한 번의 드릴 가공을 통해 동시에 형성될 수 있다. In addition, in the present embodiment, the oil supply holes 24c are provided in a pair, and the pair of oil supply holes 24c are arranged to form a straight line with each other. Therefore, the pair of oil supply holes 24c may be simultaneously formed through one drill process in the state in which the oil storage groove 24b is processed.

이상에서 상세히 설명한 바와, 본 발명에 따른 밀폐형 압축기는 커넥팅로드의 소경부를 피스톤에 체결시키기 위한 피스톤핀에 오일의 일시저장을 위한 오일저장홈과, 오일저장홈에 저장되는 오일을 피스톤핀 외경과 커넥팅로드의 소경부 외경 사이로 공급하기 위한 오일공급홀이 형성된다. 따라서 본 발명에 따른 밀폐형 압축기는 회전축의 오일유로를 통해 편심축부 상부로 비산되는 오일을 상기 오일저장홈에 저장할 수 있게 되고, 이렇게 오일저장홈에 저장된 오일이 상기 오일공급홀을 따라 피스톤핀 외경과 커넥팅로드의 소경부 내경 사이로 지속적으로 공급됨에 따라 오일을 통한 피스톤핀과 커넥팅로드 사이의 윤활작용을 보다 효과적으로 수행할 수 있게 된다. As described above in detail, the hermetic compressor according to the present invention connects the oil storage groove for temporarily storing oil to the piston pin for fastening the small diameter portion of the connecting rod to the piston, and connecting the oil stored in the oil storage groove to the piston pin outer diameter. An oil supply hole for supplying between the outer diameter of the small diameter portion of the rod is formed. Therefore, the hermetic compressor according to the present invention can store the oil scattered to the upper portion of the eccentric shaft through the oil flow path of the rotating shaft in the oil storage groove, and the oil stored in the oil storage groove has a piston pin outer diameter along the oil supply hole. As it is continuously supplied between the inner diameter of the small diameter portion of the connecting rod, lubrication between the piston pin and the connecting rod through oil can be performed more effectively.

Claims (3)

상단에 편심축부가 형성되고 상기 편심축부 상부로 오일을 비산시키는 오일유로를 구비하는 회전축과, 실린더 내부에 직선왕복운동 가능하도록 피스톤과, 상기 편심축부의 편심회전운동을 상기 피스톤의 직선왕복운동으로 전환시키도록 상기 편심축부와 피스톤 사이를 연결하며 상기 피스톤 내부로 삽입되는 소경부를 구비하는 커넥팅로드와, 상기 커넥팅로드와 상기 피스톤 사이의 결합을 위해 상기 소경부 내경에 삽입되도록 상기 피스톤에 체결되는 피스톤핀을 구비하는 밀폐형 압축기에 있어서,An eccentric shaft portion is formed at an upper end thereof, and includes a rotary shaft having an oil flow path for dispersing oil over the eccentric shaft portion, a piston for linear reciprocating movement inside the cylinder, and an eccentric rotational movement of the eccentric shaft portion as a linear reciprocating movement of the piston. A connecting rod having a small diameter portion connected between the eccentric shaft portion and the piston to be switched and inserted into the piston, and a piston fastened to the piston to be inserted into the small diameter portion inner diameter for engagement between the connecting rod and the piston. In a hermetic compressor having a pin, 상기 피스톤핀은 상기 편심축부 상부로부터 비산된 오일을 내부에 저장하도록 상부로 개방된 오일저장홈과, 상기 오일저장홈에 저장된 오일을 상기 피스톤핀 외면과 상기 소경부 내경 사이로 공급하도록 상기 오일저장홈과 상기 피스톤핀 외면 사이를 연통시키는 오일공급홀을 포함하는 것을 특징으로 하는 밀폐형 압축기.The piston pin is an oil storage groove open to the upper to store the oil scattered from the upper portion of the eccentric shaft and the oil storage groove to supply the oil stored in the oil storage groove between the piston pin outer surface and the small diameter inner diameter. And an oil supply hole communicating between the piston pin and an outer surface of the piston pin. 제 1항에 있어서,The method of claim 1, 상기 오일공급홀은 하부 쪽 상기 오일저장홈과 연통되고, 상기 오일저장홈과 수직으로 교차하도록 마련된 것을 특징으로 하는 밀폐형 압축기. The oil supply hole is in communication with the oil storage groove on the lower side, hermetic compressor characterized in that it is provided to cross perpendicular to the oil storage groove. 제 1항에 있어서,The method of claim 1, 상기 오일공급홀은 상호 일직선형태로 배열된 한 쌍으로 마련된 것을 특징으 로 하는 밀폐형 압축기. The oil supply hole is a hermetic compressor, characterized in that provided in a pair arranged in a straight line form.
KR1020070041427A 2007-04-27 2007-04-27 Hermetic type compressor KR20080096235A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112832982A (en) * 2019-11-22 2021-05-25 安徽美芝制冷设备有限公司 Crankshaft, compressor and refrigeration equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112832982A (en) * 2019-11-22 2021-05-25 安徽美芝制冷设备有限公司 Crankshaft, compressor and refrigeration equipment
CN112832982B (en) * 2019-11-22 2022-03-25 安徽美芝制冷设备有限公司 Crankshaft, compressor and refrigeration equipment

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