KR100782885B1 - Compressing mechanism for hermetic compressor - Google Patents

Compressing mechanism for hermetic compressor Download PDF

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Publication number
KR100782885B1
KR100782885B1 KR1020060081001A KR20060081001A KR100782885B1 KR 100782885 B1 KR100782885 B1 KR 100782885B1 KR 1020060081001 A KR1020060081001 A KR 1020060081001A KR 20060081001 A KR20060081001 A KR 20060081001A KR 100782885 B1 KR100782885 B1 KR 100782885B1
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KR
South Korea
Prior art keywords
piston
frame
crankshaft
sintering
cylinder
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KR1020060081001A
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Korean (ko)
Inventor
이원석
박동인
김태민
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엘지전자 주식회사
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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
    • F04B39/0005—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
    • 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
    • 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
    • F04B39/0094—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 crankshaft
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • 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
    • 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
    • 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
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/21—Manufacture essentially without removing material by casting
    • 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
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/22—Manufacture essentially without removing material by sintering

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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 compressing mechanism for a hermetic compressor is provided to use a cylinder and a frame separately prepared from each other and a piston formed by sintering, thereby minimizing thermal deformation of the piston due to friction and improving operation reliability of the compressor. A compressing mechanism for a hermetic compressor includes a crank shaft(28) supported by a frame(20) to rotate by a motor part and having an eccentric pin(30) at an eccentric position from a rotation center thereof. A cylinder(22) is separated prepared from the frame and mounted on the frame, wherein a compression chamber(24) is penetratingly formed inside. A piston(34) is prepared by sintering to be mounted in the compression chamber and reciprocates by the driving force of the crank shaft for compressing working fluid. A connecting rod(38) connects the piston to the crank shaft for converting rotation motion of the crank shaft to the rectilinear reciprocation motion of the piston. The cylinder is prepared by sintering or molding and has mounting parts(26) at both sides to be coupled with the frame.

Description

밀폐형 압축기의 압축기구부{Compressing mechanism for hermetic compressor}Compressing mechanism for hermetic compressor {Compressing mechanism for hermetic compressor}

도 1은 종래 기술에 의한 밀폐형 압축기의 압축기구부를 보인 부분단면 측면도.1 is a partial cross-sectional side view showing a compression mechanism of the hermetic compressor according to the prior art.

도 2는 본 발명에 의한 밀폐형 압축기의 압축기구부의 구성을 보인 부분단면 측면도.Figure 2 is a partial cross-sectional side view showing the configuration of the compression mechanism of the hermetic compressor according to the present invention.

도 3은 본 발명 실시예의 압축기구부를 구성하는 피스톤과 종래의 피스톤의 열변형을 보인 그래프.Figure 3 is a graph showing the heat deformation of the piston and the conventional piston constituting the compression mechanism of the embodiment of the present invention.

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

20: 프레임 22: 실린더20: frame 22: cylinder

24: 압축실 26: 장착부24: compression chamber 26: mounting portion

28: 크랭크축 29: 모터부28: crankshaft 29: motor part

30: 편심핀 32: 균형추30: eccentric pin 32: counterweight

34: 피스톤 36: 연결쳄버34: piston 36: connection chamber

38: 커넥팅로드 40: 크랭크축연결부38: connecting rod 40: crankshaft connection

42: 피스톤연결부 44: 피스톤핀42: piston connection 44: piston pin

본 발명은 밀폐형 압축기에 관한 것으로, 더욱 상세하게는 압축기에서 작동유체를 압축하는 밀폐형 압축기의 압축기구부에 관한 것이다.The present invention relates to a hermetic compressor, and more particularly to a compression mechanism of the hermetic compressor for compressing the working fluid in the compressor.

도 1에는 종래 기술에 의한 밀폐형 압축기의 압축기구부의 구성이 도시되어 있다. 이에 따르면, 밀폐용기(도시되지 않음)의 내부에 프레임(1)이 설치되고, 상기 프레임(1)의 상면 일측에는 실린더(3)가 구비된다. 상기 실린더(3)를 전후로 관통해서는 작동유체가 압축되는 압축실(5)이 형성된다.1 shows a configuration of a compression mechanism of a hermetic compressor according to the prior art. According to this, the frame 1 is installed inside the sealed container (not shown), and the cylinder 3 is provided on one side of the upper surface of the frame 1. A compression chamber 5 through which the working fluid is compressed is formed by penetrating the cylinder 3 back and forth.

상기 프레임(1)을 상하로 관통하여서는 크랭크축(7)이 회전가능하게 설치된다. 상기 크랭크축(7)은 모터부(도시되지 않음)로부터 동력을 전달받아 회전한다. 상기 크랭크축(7)의 상단에는 크랭크축(7)의 회전중심에서 편심된 위치에 편심핀(8)이 구비되고, 상기 편심핀(8)에 의한 회전불균형을 제거하기 위해 균형추(9)가 구비된다.The crankshaft 7 is rotatably installed to penetrate the frame 1 up and down. The crankshaft 7 is rotated by receiving power from a motor unit (not shown). The upper end of the crankshaft 7 is provided with an eccentric pin 8 at an eccentric position at the center of rotation of the crankshaft 7, and the counterweight 9 to remove the rotational imbalance by the eccentric pin 8 It is provided.

상기 크랭크축(7)의 회전력을 상기 압축실(5)의 피스톤(15)의 직선왕복운동으로 변환하는 커넥팅로드(11)가 구비된다. 상기 커넥팅로드(11)에는 상기 편심핀(8)에 연결되는 크랭크축연결부(12)가 링형상으로 일단부에 구비되고, 타단부에는 피스톤(15)에 연결되는 피스톤연결부(13)가 구비된다. 상기 피스톤연결부(13)는 볼형상으로 된다.A connecting rod 11 for converting the rotational force of the crankshaft 7 into a linear reciprocating motion of the piston 15 of the compression chamber 5 is provided. The connecting rod 11 has a crankshaft connecting portion 12 connected to the eccentric pin 8 at one end in a ring shape, and a piston connecting portion 13 connected to the piston 15 at the other end thereof. . The piston connecting portion 13 has a ball shape.

상기 피스톤연결부(13)에 의해 커넥팅로드(11)와 연결된 피스톤(15)은 상기 압축실(5) 내부에서 직선왕복운동하면서 작동유체를 압축한다. 상기 피스톤(15)은 볼형태인 피스톤연결부(13)와의 연결이 코킹을 통해 이루어지므로 단조작업으로 피스톤을 제작한다.The piston 15 connected to the connecting rod 11 by the piston connecting portion 13 compresses the working fluid while linearly reciprocating in the compression chamber 5. Since the piston 15 is connected to the piston connecting portion 13 having a ball shape through the caulking, the piston is manufactured by forging.

그러나 상기한 바와 같은 종래 기술에서는 다음과 같은 문제점이 있다.However, the prior art as described above has the following problems.

상기 피스톤(15)은 단조작업에 의해 만들어지기 때문에 상대적으로 열변형이 큰 문제점이 있다. 이와 같은 열변형의 문제는 피스톤(15)의 크기가 커질수록 더 커지므로 대형압축기에 단조로 만든 피스톤(15)을 적용하는 것은 더 많은 열변형문제를 일으킨다. 따라서, 종래와 같은 압축기구부는 단지 소형 압축기에만 적용할 수 있고 대형 압축기에는 적용하기 어렵다.Since the piston 15 is made by a forging operation, there is a relatively large heat deformation problem. Since the problem of thermal deformation becomes larger as the size of the piston 15 increases, the application of the forged piston 15 to the large compressor causes more heat deformation problems. Therefore, the conventional compression mechanism can be applied only to a small compressor and difficult to apply to a large compressor.

그리고, 종래 기술에서는 상기 피스톤(15)과 커넥팅로드(11)가 연결되는 볼형태의 피스톤연결부(13)는 피스톤(15)의 내부에 구비된 코킹부의 내부에 들어가므로 윤활을 위한 오일의 공급이 거의 불가능하여 마찰에 의한 열발생과 마모의 문제가 더 많아지는 문제점도 있었다.In the related art, the piston connecting portion 13 having a ball shape in which the piston 15 and the connecting rod 11 are connected to the inside of the caulking portion provided in the piston 15 is used to supply oil for lubrication. There was also a problem that the problem of heat generation and abrasion caused by friction is more impossible.

따라서, 본 발명의 목적은 상기한 바와 같은 종래 기술의 문제점을 해결하기 위한 것으로, 압축기의 용량에 상관없이 적용할 수 있고 열변형의 문제가 최소화된 밀폐형 압축기의 압축기구부를 제공하는 것이다.Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a compression mechanism of the hermetic compressor which can be applied regardless of the capacity of the compressor and the problem of thermal deformation is minimized.

본 발명의 다른 목적은 윤활이 보다 용이한 밀폐형 압축기의 압축기구부를 제공하는 것이다.Another object of the present invention is to provide a compression mechanism of the hermetic compressor which is easier to lubricate.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 본 발명은 프레임에 회전가능하게 지지되고 회전중심에서 편심된 위치에 편심핀이 구비되며 모터부에 의해 구동되는 크랭크축과, 상기 프레임과 별개로 제작되어 프레임상에 장착되고 압축실이 관통하여 형성되는 실린더와, 상기 압축실에 설치되고 크랭크축의 구동력을 전달받아 직선왕복운동하면서 작동유체를 압축하며 소결에 의해 제작된 피스톤과, 상기 피스톤과 크랭크축을 연결하여 상기 크랭크축의 회전운동을 상기 피스톤의 직선왕복운동으로 변환하는 커넥팅로드를 포함하여 구성되고, 상기 실린더는 주물이나 소결에 의해 형성되고, 외면 양측에 상기 프레임에 체결되는 장착부가 돌출되어 형성된다.According to a feature of the present invention for achieving the object as described above, the present invention is provided with a crank shaft rotatably supported on the frame and provided with an eccentric pin in an eccentric position at the center of rotation and driven by a motor unit, and the frame A cylinder which is manufactured separately from and mounted on a frame and formed through the compression chamber, and a piston which is installed in the compression chamber and receives a driving force of the crankshaft and compresses the working fluid while linearly reciprocating and compresses the working fluid, It comprises a connecting rod for connecting the piston and the crankshaft to convert the rotational movement of the crankshaft to linear reciprocating motion of the piston, the cylinder is formed by casting or sintering, the mounting portion is fastened to the frame on both sides of the outer surface It protrudes and is formed.

상기 커넥팅로드의 양단에는 각각 크랭크축의 편심핀에 연결되는 크랭크축연결부와 피스톤에 연결되는 피스톤연결부가 각각 링형상으로 구비되는데, 상기 피스톤연결부는 상기 피스톤에 설치된 피스톤핀에 상대회전가능하게 연결된다.Both ends of the connecting rod are each provided with a crankshaft connecting portion connected to the eccentric pin of the crankshaft and a piston connecting portion connected to the piston in a ring shape, and the piston connecting portion is connected to the piston pin installed in the piston so as to be relatively rotatable.

상기 프레임과 크랭크축은 주물이나 소결공정에 의해 제작되고, 상기 커넥팅로드는 소결에 의해 제작된다.The frame and the crankshaft are manufactured by casting or sintering process, and the connecting rod is manufactured by sintering.

삭제delete

이와 같은 구성을 가지는 본 발명의 압축기구부는 열변형 문제가 거의 없어 압축기의 용량에 상관없이 압축기에 적용할 수 있으며, 상대적으로 피스톤과 커넥팅로드의 연결부에 윤활이 원활하게 되어 마찰부에서 발생하는 마모나 발열이 최소화되면서 압축기구부의 동작신뢰성이 커지는 이점이 있다.Compressor sphere of the present invention having such a configuration can be applied to the compressor irrespective of the capacity of the compressor because there is almost no heat deformation problem, and the lubrication is smoothly generated at the connecting portion between the piston and the connecting rod, the wear caused by the friction portion As the heat generation is minimized, the operation reliability of the compression mechanism is increased.

이하 본 발명에 의한 밀폐형 압축기의 압축기구부의 바람직한 실시예를 첨부된 도면을 참고하여 상세하게 설명한다.Hereinafter, preferred embodiments of the compression mechanism of the hermetic compressor according to the present invention will be described in detail with reference to the accompanying drawings.

도 2에는 본 발명에 의한 밀폐형 압축기의 압축기구부의 구성이 부분단면 측 면도로 도시되어 있다. 이에 따르면, 프레임(20)은 밀폐용기(도시되지 않음)의 내부에 설치된다. 상기 프레임(20)은 밀폐용기의 내부에 스프링과 같은 것에 의해 지지된 상태로 설치되어 진동과 충격을 완화시킬 수 있다. 이와 같은 프레임(20)은 주물이나 소결작업에 의해 만들어진다. 상기 프레임(20)은 주물로 제작하는 것이 바람직하다.2 is a partial cross-sectional side view of the configuration of the compression mechanism of the hermetic compressor according to the present invention. According to this, the frame 20 is installed inside the sealed container (not shown). The frame 20 is installed in a state of being supported by a spring, such as inside the sealed container can mitigate vibration and shock. Such a frame 20 is made by casting or sintering. The frame 20 is preferably manufactured by casting.

상기 프레임(20) 상에는 실린더(22)가 설치된다. 상기 실린더(22)는 상기 프레임(20)과 별개로 형성되어 상기 프레임(20) 상에 장착된다. 상기 실린더(22) 역시 주물이나 소결작업에 의해 만들어진다. 상기 실린더(22)도 주물로 제작하는 것이 바람직하다.The cylinder 22 is installed on the frame 20. The cylinder 22 is formed separately from the frame 20 and mounted on the frame 20. The cylinder 22 is also made by casting or sintering. It is preferable to also manufacture the said cylinder 22 by casting.

상기 실린더(22)의 내부를 전후로 관통하여서는 아래에서 설명될 피스톤(34)이 직선왕복운동하면서 작동유체를 압축하는 압축실(24)이 형성된다. 참고로, 상기 압축실(24)의 선단 가장자리에 해당되는 실린더(22)의 전면에는 밸브어셈블리(도시되지 않음)와 헤드커버(도시되지 않음) 등이 장착되어 상기 압축실(24)로의 작동유체의 출입을 제어한다.Through the inside of the cylinder 22 back and forth, a compression chamber 24 is formed to compress the working fluid while the piston 34 to be described below is linearly reciprocated. For reference, a valve assembly (not shown) and a head cover (not shown) and the like are mounted on a front surface of the cylinder 22 corresponding to the leading edge of the compression chamber 24 to operate the fluid to the compression chamber 24. Control the entry and exit of

상기 실린더(22)의 외측면 양단에는 상기 프레임(20)상에 안착되고 볼트 등에 의해 상기 프레임(20)에 체결되는 장착부(26)가 구비된다. 상기 실린더(22)가 상기 프레임(20)과 별개로 제작되어 추후에 장착됨에 의해 아래에서 설명될 크랭크축(28)과 커넥팅로드(38)의 조립시에 별도의 슬리이브를 사용하지 않아도 된다.Both ends of the outer surface of the cylinder 22 are provided with mounting portions 26 seated on the frame 20 and fastened to the frame 20 by bolts or the like. Since the cylinder 22 is manufactured separately from the frame 20 and later mounted, it is not necessary to use a separate sleeve when assembling the crankshaft 28 and the connecting rod 38 to be described below.

크랭크축(28)은 상기 프레임(20)을 상하로 관통하여 회전가능하게 설치된다. 상기 크랭크축(28)은 도 2에 점선으로 표시된 모터부(29)에 의해 회전된다. 즉, 모 터부(29)의 회전자와 크랭크축(28)이 일체로 회전됨에 의해 작동유체의 압축을 위한 동력을 제공한다.The crankshaft 28 is rotatably installed to penetrate the frame 20 up and down. The crankshaft 28 is rotated by the motor portion 29 indicated by the dotted line in FIG. That is, the rotor and the crankshaft 28 of the motor unit 29 is integrally rotated to provide power for compressing the working fluid.

상기 크랭크축(28)의 상단에는 편심핀(30)이 구비된다. 상기 편심핀(30)은 상기 크랭크축(28)의 회전중심에서 편심된 위치에 형성된다. 상기 편심핀(30)이 형성된 반대쪽으로 돌출되게 상기 크랭크축(28)에는 균형추(32)가 구비된다. 상기 균형추(32)는 상기 편심핀(30)에 의한 크랭크축(28)의 회전불균형을 제거하는 역할을 한다. 이와 같은 구성을 가지는 상기 크랭크축(28)은 주물이나 소결작업에 의해 만들어질 수 있다.An eccentric pin 30 is provided at the upper end of the crankshaft 28. The eccentric pin 30 is formed at a position eccentrically at the center of rotation of the crankshaft 28. A counterweight 32 is provided on the crankshaft 28 so as to protrude to the opposite side where the eccentric pin 30 is formed. The counterweight 32 serves to eliminate the rotational imbalance of the crankshaft 28 by the eccentric pin (30). The crankshaft 28 having such a configuration can be made by casting or sintering.

피스톤(34)은 상기 실린더(22)의 압축실(24) 내에 설치되는 것이다. 상기 피스톤(24)은 소결하여 만들어지는 것이다. 상기 피스톤(34)을 소결하여 만들게 되면 열에 의한 변형을 최소화할 수 있게 된다. 상기 피스톤(34)의 내부에는 후단으로 개구되게 연결쳄버(36)가 형성된다. 상기 연결쳄버(36)에는 아래에서 설명될 커넥팅로드(38)와의 연결을 위한 구성이 구비된다.The piston 34 is installed in the compression chamber 24 of the cylinder 22. The piston 24 is made by sintering. When the piston 34 is made by sintering, it is possible to minimize deformation due to heat. A connection chamber 36 is formed in the piston 34 to open to the rear end. The connection chamber 36 is provided with a configuration for connection with the connecting rod 38 to be described below.

커넥팅로드(38)는 상기 크랭크축(28)의 회전력을 상기 피스톤(34)의 직선왕복운동으로 변환하는 역할을 한다. 상기 커넥팅로드(38)는 주로 소결공정에 의해 만들어지는데, 일단부에는 크랭크축연결부(40)가 링형상으로 형성되고, 타단부에는 피스톤연결부(42)가 역시 링형상으로 형성된다. 상기 크랭크축연결부(40)는 상기 크랭크축(28)의 편심핀(30)과 상대회전 가능하게 연결되는 것이고, 상기 피스톤연결부(42)는 상기 피스톤(34)과 피스톤핀(44)에 의해 연결된다. 이때, 상기 피스톤핀(44)과 상기 피스톤연결부(42)는 상대회전 가능하게 연결된다. 상기 피스톤 핀(44)은 스틸로 만들어진다.The connecting rod 38 serves to convert the rotational force of the crankshaft 28 into a linear reciprocating motion of the piston 34. The connecting rod 38 is mainly made by a sintering process, one end of the crankshaft connecting portion 40 is formed in a ring shape, the other end of the piston connecting portion 42 is also formed in a ring shape. The crankshaft connecting portion 40 is connected to the eccentric pin 30 of the crankshaft 28 so as to rotate relative, the piston connecting portion 42 is connected by the piston 34 and the piston pin 44 do. At this time, the piston pin 44 and the piston connecting portion 42 is connected to the relative rotation. The piston pin 44 is made of steel.

이하 상기한 바와 같은 구성을 가지는 본 발명에 의한 밀폐형 압축기의 압축기구부의 작용을 상세하게 설명한다.Hereinafter, the operation of the compression mechanism of the hermetic compressor according to the present invention having the configuration as described above will be described in detail.

먼저, 상기 프레임(20)에 압축기구부를 조립하는 것을 설명한다. 상기 프레임(20)을 상하로 관통하게 크랭크축(28)이 설치된다. 상기 크랭크축(28)에는 모터부(29)의 회전자가 또한 일체로 설치되는데, 상기 프레임(20)에 크랭크축(28)을 설치한 후에 회전자가 설치된다.First, the assembly of the compression mechanism to the frame 20 will be described. The crankshaft 28 is installed to penetrate the frame 20 up and down. The crankshaft 28 is also integrally provided with a rotor of the motor unit 29, and after the crankshaft 28 is installed in the frame 20, the rotor is installed.

상기 피스톤(34)과 커넥팅로드(38)는 피스톤핀(44)에 의해 연결된다. 즉, 상기 커넥팅로드(38)의 피스톤연결부(42)를 상기 피스톤(34)의 연결쳄버(36)에 삽입한 상태에서 상기 피스톤(34)을 관통하여 상기 피스톤핀(44)을 설치하면 된다. 상기 피스톤핀(44)이 상기 피스톤(34)을 관통하여 설치되는 구조에는 다양한 것이 있을 수 있다. 예를 들면, 상기 피스톤핀(44)이 상기 피스톤(34)에 형성된 피스톤핀공(도면부호 부여 않음)에 압입되도록 하는 것이다.The piston 34 and the connecting rod 38 are connected by the piston pin 44. That is, the piston pin 44 may be installed through the piston 34 in a state in which the piston connecting portion 42 of the connecting rod 38 is inserted into the connecting chamber 36 of the piston 34. There may be a variety of structures in which the piston pin 44 is installed to penetrate the piston 34. For example, the piston pin 44 is to be pressed into the piston pin hole (not shown) formed in the piston 34.

이와 같이 피스톤(34)과 커넥팅로드(38)가 연결된 상태에서 상기 실린더(22)의 압축실(24)에 상기 피스톤(34)을 삽입하고, 상기 커넥팅로드(38)의 크랭크축연결부(40)를 상기 편심핀(30)에 삽입한다. 물론, 상기 피스톤(34)을 압축실(24)에 삽입하기 전에 크랭크축연결부(40)를 상기 편심핀(30)과 연결할 수도 있다.The piston 34 is inserted into the compression chamber 24 of the cylinder 22 while the piston 34 and the connecting rod 38 are connected as described above, and the crankshaft connecting portion 40 of the connecting rod 38 is inserted therein. Is inserted into the eccentric pin (30). Of course, the crankshaft connecting portion 40 may be connected to the eccentric pin 30 before the piston 34 is inserted into the compression chamber 24.

다음으로, 상기 실린더(22)의 장착부(26)를 상기 프레임(20) 상의 정해진 위치에 설치하고, 상기 장착부(26)를 프레임(20)에 체결하여, 실린더(22)가 프레임(20)에 고정되게 한다.Next, the mounting portion 26 of the cylinder 22 is installed at a predetermined position on the frame 20, and the mounting portion 26 is fastened to the frame 20 so that the cylinder 22 is attached to the frame 20. To be fixed.

이와 같이 조립이 된 압축기구부는 실제 압축기가 구동되면, 상기 모터부(29)의 회전력을 전달받아 상기 크랭크축(28)이 회전한다. 상기 크랭크축(28)이 회전하면 상기 편심핀(30)이 크랭크축(28)의 회전중심을 중심으로 공전하므로 상기 커넥팅로드(38)의 크랭크축연결부(40)도 같이 공전하게 된다.When the compression mechanism is assembled as described above, when the actual compressor is driven, the crank shaft 28 rotates by receiving the rotational force of the motor unit 29. When the crankshaft 28 rotates, the eccentric pin 30 revolves around the center of rotation of the crankshaft 28 so that the crankshaft connecting portion 40 of the connecting rod 38 also revolves.

따라서, 상기 커넥팅로드(38)의 타단부인 피스톤연결부(42)는 상기 피스톤(34)이 압축실(24)내에서 직선왕복운동하게 한다. 물론, 상기 피스톤연결부(42)는 상기 피스톤핀(44)에 대해서 상대회전하면서 상기 피스톤(34)과 함께 이동된다.Accordingly, the piston connecting portion 42, which is the other end of the connecting rod 38, causes the piston 34 to linearly reciprocate in the compression chamber 24. Of course, the piston connecting portion 42 is moved together with the piston 34 while rotating relative to the piston pin (44).

한편, 상기 피스톤(34)은 상기 실린더(22)의 압축실(24) 내면과 마찰되고, 상기 피스톤핀(44)은 상기 피스톤연결부(42)와 상대 회전함에 의해 마찰에 의한 발열이 있을 수 있다.On the other hand, the piston 34 is rubbed with the inner surface of the compression chamber 24 of the cylinder 22, the piston pin 44 may be the heat generated by the friction by the relative rotation with the piston connecting portion (42). .

하지만, 상기 피스톤(34)은 소결공정에 의해 제작되므로 열변형이 거의 없어 피스톤(34)의 외면이나 압축실(24)의 내면에 마모가 거의 발생하지 않게 된다. 참고로 도 3에는 종래의 피스톤과 본 발명의 피스톤(34)이 온도가 약 120℃에서 발생하는 열변형량이 도시되어 있다. 이에 따르면, 종래의 경우인 (A)에서는 피스톤 외경의 최대 변형량이 15㎛이었으나, 본 발명인 (B)에서는 최대 변형량이 10㎛이었다. 따라서, 본 발명의 경우 종래에 비해 약 33% 정도의 열변형 개선효과를 얻을 수 있다.However, since the piston 34 is manufactured by the sintering process, there is almost no thermal deformation, so that abrasion hardly occurs on the outer surface of the piston 34 or the inner surface of the compression chamber 24. For reference, FIG. 3 shows a thermal deformation amount of the conventional piston and the piston 34 of the present invention at a temperature of about 120 ° C. According to this, in the conventional case (A), the maximum deformation amount of the piston outer diameter was 15 µm, while in the present inventor (B), the maximum deformation amount was 10 µm. Therefore, in the case of the present invention, a thermal deformation improvement effect of about 33% can be obtained.

한편, 압축기에서는 일반적으로 크랭크축(28)의 내부를 관통하여 오일유로가 형성되고, 이 유로를 통해 흡상된 오일이 편심핀(30)을 통해 상부로 비산된다. 이와 같이 비산된 오일은 발열부와 마찰부에 전달되어 냉각과 윤활작용을 한다.On the other hand, in the compressor, generally an oil flow path is formed through the inside of the crankshaft 28, and oil sucked through the flow path is scattered upward through the eccentric pin 30. The oil scattered as described above is transferred to the heating part and the friction part to cool and lubricate.

상기 오일중에서 상기 피스톤(44)이 하사점에 있을 때, 즉 상기 압축실(24)의 후단으로 피스톤(44)의 후방이 빠져나왔을 때 피스톤(44)에 전달된 오일은 상기 피스톤핀공을 통해서 피스톤핀(44)과 피스톤연결부(42) 사이의 마찰부로 전달될 수 있어, 마모와 발열을 최소화할 수 있게 된다.In the oil, when the piston 44 is at the bottom dead center, that is, when the rear of the piston 44 exits the rear end of the compression chamber 24, the oil transferred to the piston 44 passes through the piston pin hole. It can be transferred to the friction portion between the pin 44 and the piston connection portion 42, thereby minimizing wear and heat generation.

본 발명의 권리는 위에서 설명된 실시예에 한정되지 않고 청구범위에 기재된 바에 의해 정의되며, 본 발명의 기술분야에서 통상의 지식을 가진 자가 청구범위에 기재된 권리범위 내에서 다양한 변형과 개작을 할 수 있다는 것은 자명하다.The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self-evident.

위에서 상세히 설명한 바와 같은 본 발명에 의한 밀폐형 압축기의 압축기구부에서는 다음과 같은 효과를 얻을 수 있다.In the compression mechanism of the hermetic compressor according to the present invention as described in detail above, the following effects can be obtained.

본 발명에서는 프레임과 분리된 실린더를 사용하는 압축기구부에서 실린더 내부의 압축실에 설치되는 피스톤을 소결에 의해 제작된 것을 사용한다. 따라서, 피스톤이 열변형에 상대적으로 강해 마찰 등에 의해 발생할 수 있는 열변형량이 최소화되면서 압축기의 동작신뢰성이 높아지고, 상대적으로 피스톤의 크기가 큰 것이 사용되는 대용량 압축기에도 본 발명의 압축기구부를 적용할 수 있게 되는 효과가 있다.In the present invention, a piston manufactured by sintering the piston installed in the compression chamber inside the cylinder at the compression mechanism using the cylinder separated from the frame is used. Therefore, the piston is relatively resistant to thermal deformation, thereby minimizing the amount of thermal deformation that may occur due to friction, thereby increasing the operational reliability of the compressor, and applying the compression mechanism of the present invention to a large capacity compressor in which a relatively large piston is used. It is effective.

그리고, 본 발명에서는 소결작업에 의해 제작된 피스톤을 사용하므로 피스톤과 커넥팅로드의 연결을 위한 스틸재질의 피스톤핀을 사용한다. 따라서, 상기 피스톤핀이 피스톤에 압입되는 부분을 통해 오일 공급이 상대적으로 원활하여 피스톤핀부분의 윤활과 방열이 원활하게 되어 압축기의 동작 신뢰성이 커지는 효과도 있다.In the present invention, since the piston produced by the sintering operation is used, a piston pin made of steel for connecting the piston and the connecting rod is used. Therefore, the oil supply is relatively smooth through the portion of the piston pin press-fitted to the piston, so that the lubrication and heat dissipation of the piston pin are smooth, thereby increasing the operational reliability of the compressor.

Claims (4)

프레임에 회전가능하게 지지되고 회전중심에서 편심된 위치에 편심핀이 구비되며 모터부에 의해 구동되는 크랭크축과,A crank shaft rotatably supported by the frame and provided with an eccentric pin at an eccentric position in the rotation center and driven by a motor unit; 상기 프레임과 별개로 제작되어 프레임상에 장착되고 압축실이 관통하여 형성되는 실린더와,A cylinder manufactured separately from the frame and mounted on the frame and formed through the compression chamber; 상기 압축실에 설치되고 크랭크축의 구동력을 전달받아 직선왕복운동하면서 작동유체를 압축하며 소결에 의해 제작된 피스톤과,A piston which is installed in the compression chamber and receives a driving force of the crankshaft and compresses the working fluid while linearly reciprocating and manufactured by sintering; 상기 피스톤과 크랭크축을 연결하여 상기 크랭크축의 회전운동을 상기 피스톤의 직선왕복운동으로 변환하는 커넥팅로드를 포함하여 구성되고,It comprises a connecting rod for connecting the piston and the crankshaft to convert the rotational movement of the crankshaft into a linear reciprocating motion of the piston, 상기 실린더는 주물이나 소결에 의해 형성되고, 외면 양측에 상기 프레임에 체결되는 장착부가 돌출되어 형성됨을 특징으로 하는 밀폐형 압축기의 압축기구부.The cylinder is formed by casting or sintering, and the compression mechanism of the hermetic compressor, characterized in that the mounting portion which is fastened to the frame is formed on both sides of the outer surface protruding. 제 1 항에 있어서, 상기 커넥팅로드의 양단에는 각각 크랭크축의 편심핀에 연결되는 크랭크축연결부와 피스톤에 연결되는 피스톤연결부가 각각 링형상으로 구비되는데, 상기 피스톤연결부는 상기 피스톤에 설치된 피스톤핀에 상대회전가능하게 연결됨을 특징으로 하는 밀폐형 압축기의 압축기구부.According to claim 1, wherein both ends of the connecting rod is provided with a crankshaft connecting portion connected to the eccentric pin of the crankshaft and a piston connecting portion connected to the piston, respectively, the piston connecting portion relative to the piston pin installed on the piston Compressor part of the hermetic compressor, characterized in that rotatably connected. 제 2 항에 있어서, 상기 프레임과 크랭크축은 주물이나 소결공정에 의해 제 작되고, 상기 커넥팅로드는 소결에 의해 제작됨을 특징으로 하는 밀폐형 압축기의 압축기구부.3. The compression mechanism of the hermetic compressor according to claim 2, wherein the frame and the crankshaft are manufactured by casting or sintering, and the connecting rod is manufactured by sintering. 삭제delete
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KR101983465B1 (en) * 2017-09-28 2019-08-28 엘지전자 주식회사 A Lubricant Oil Provider and a Compressor Using the Same

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