KR100301469B1 - Structure for supplying oil of hermetic motor compressor - Google Patents

Structure for supplying oil of hermetic motor compressor Download PDF

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Publication number
KR100301469B1
KR100301469B1 KR1019980006182A KR19980006182A KR100301469B1 KR 100301469 B1 KR100301469 B1 KR 100301469B1 KR 1019980006182 A KR1019980006182 A KR 1019980006182A KR 19980006182 A KR19980006182 A KR 19980006182A KR 100301469 B1 KR100301469 B1 KR 100301469B1
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South Korea
Prior art keywords
oil
connecting rod
piston
hole
piston pin
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KR1019980006182A
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Korean (ko)
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KR19990070987A (en
Inventor
성시풍
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구자홍
엘지전자 주식회사
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Priority to KR1019980006182A priority Critical patent/KR100301469B1/en
Publication of KR19990070987A publication Critical patent/KR19990070987A/en
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Publication of KR100301469B1 publication Critical patent/KR100301469B1/en

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Classifications

    • 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
    • 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
    • F04B39/0094—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
    • 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
    • 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
    • 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

Abstract

PURPOSE: Oil supply structure of a hermetic motor compressor is provided to reduce wear of the sliding portion by supplying oil to a piston, a connecting rod and a piston pin sufficiently with forming oil passages and grooves, and to improve the reliability by lengthening the life span. CONSTITUTION: A small end(8c) of a connecting rod is inserted to a piston, and combined by a piston pin(15). An eccentric part of a crankshaft including an oil passage is combined with a large end(8b). The piston is reciprocated in the cylinder by converting rotation of the crankshaft into linear motion to suck, compress and discharge gas. The oil supply structure includes an oil passage(8g) penetrating a through hole(8e) of the large part and a through hole(8f) of the small part in the connecting rod, a round oil groove(15a) formed around the piston pin and connected to the oil through hole, and spiral oil grooves(15b) formed around the piston pin and connected to the oil groove. The life span is extended with reducing wear by sufficiently supplying oil to the piston, the connecting rod and the piston pin.

Description

밀폐형 전동식 압축기의 오일공급구조Oil supply structure of hermetic electric compressor

본 발명은 밀폐형 전동식 압축기의 오일공급구조에 관한 것으로, 특히 컨넥팅로드 및 이에 연결,결합되는 피스톤핀에 오일이 충분히 공급될 수 있도록 한 밀폐형 전동식 압축기의 오일공급구조에 관한 것이다.The present invention relates to an oil supply structure of a hermetic electric compressor, and more particularly, to an oil supply structure of a hermetic electric compressor to allow sufficient oil to be supplied to a connecting rod and a piston pin connected and coupled thereto.

일반적으로 밀폐형 전동식 압축기는 소정의 내부 체적을 갖는 밀폐용기와, 상기 밀폐용기의 내측 하부에 설치되어 외부에서 공급되는 전원에 의해 구동력을 발생시키는 전동기구부와, 상기 밀폐용기의 내측 상부에 설치되어 상기 전동기구부의 구동력을 전달받아 가스를 흡입하여 압축시키는 압축기구부를 포함하여 구성된다.In general, the hermetic electric compressor is a hermetically sealed container having a predetermined internal volume, an electric mechanism part installed at an inner lower side of the hermetically sealed container to generate a driving force by power supplied from the outside, and installed at an inner upper portion of the hermetically sealed container. It is configured to include a compression mechanism for receiving and compressing the gas by receiving the driving force of the electric mechanism.

도 1은 상기 밀폐형 전동식 압축기의 일예를 도시한 것으로, 이에 도시한 바와 같이, 상기 전동기구부는 밀폐용기(1)의 내측 하부에 스프링(2)에 의해 지지되는 스테이터(STATOR)(3)와, 상기 스테이터(3)내부에 회전가능하게 결합되는 로터(ROTOR)(4)와, 내부에 오일유로(5a)가 형성되고 상단부에 편심부(5b)가 형성되어 상기 로터(4)에 압입되어 결합되는 크랭크축(5)을 포함하여 구성된다.1 shows an example of the hermetic electric compressor, and as shown therein, the electric mechanism part includes a stator 3 supported by a spring 2 at an inner lower portion of the hermetic container 1, A rotor (ROTOR) 4 is rotatably coupled to the inside of the stator 3, and an oil passage 5a is formed therein, and an eccentric portion 5b is formed at an upper end thereof, and is pressed into the rotor 4 to be coupled thereto. It is comprised including the crankshaft 5 which becomes.

상기 압축기구부는 일측에 실린더(6a)가 형성되고 측부에 상기 크랭크축(5)이 삽입되는 관통공(6b)이 형성되어 이루어져 상기 크랭크축(5)이 삽입됨과 더불어 상기 스테이터(3)에 지지,고정되는 실린더블럭(6)과, 상기 실린더(6a)에 슬라이딩가능하도록 삽입되는 피스톤(7)과, 상기 피스톤(7)과 크랭크축의 편심부(5b)를 연결하여 크랭크축(5)의 회전운동을 직선운동으로 변환하여 피스톤(7)을 실린더(6a)내에서 왕복운동시키는 컨넥팅로드(8)와, 상기 실린더(6a)의 일측 단부에 결합되어 실린더(6a)내로의 가스 흡입과 토출을 안내하는 밸브어셈블리(9) 및 이에 결합되는 헤드커버(10)와 상기 헤드커버(10)와 연통되도록 결합되어 소음을 저감시키는 소음기(11)를 포함하여 구성된다.The compressor section is formed with a cylinder 6a on one side and a through hole 6b through which the crankshaft 5 is inserted into the side thereof, whereby the crankshaft 5 is inserted and supported by the stator 3. Rotation of the crankshaft 5 is connected to the fixed cylinder block 6, the piston 7 slidably inserted into the cylinder 6a, and the piston 7 and the eccentric portion 5b of the crankshaft. A connecting rod 8 which reciprocates the piston 7 in the cylinder 6a by converting the motion into a linear motion, and is coupled to one end of the cylinder 6a to inhale and discharge gas into the cylinder 6a. It comprises a valve assembly (9) for guiding and the head cover 10 coupled thereto and a silencer (11) coupled to communicate with the head cover (10) to reduce noise.

그리고 상기 밀페용기(1)의 저면에는 슬라이딩되는 부분에 공급되는 오일이 채워져있고, 상기 밀폐용기(1)의 일측에는 가스가 상기 실린더(6a)내로 유입되도록 안내하는 흡입파이프(12)가 결합되며, 그 측부에는 실린더(6a)에서 압축된 가스가 토출되는 토출파이프(13)가 결합된다.And the bottom surface of the hermetic container (1) is filled with the oil supplied to the sliding portion, one side of the closed container (1) is coupled to the suction pipe 12 for guiding the gas into the cylinder (6a) The discharge pipe 13 for discharging the gas compressed in the cylinder 6a is coupled to the side thereof.

미설명 부호 14는 크랭크축의 편심부와 컨넥팅로드사이에 삽입되는 슬리이브(SLEEVE)이며, 15는 컨넥팅로드와 피스톤을 연결하는 피스톤핀을 나타낸 것이다. 상기한 바와 같은 밀폐형 전동식 압축기의 작동은 먼저, 전류가 인가되면 로터(4)가 회전함과 더불어 이에 결합된 크랭크축(5)이 회전하게 된다. 상기 크랭크축(5)의 회전에 의해 크랭크축의 편심부(5b)에 결합된 컨넥팅로드(8)가 편심부(5b)의 원운동을 직선운동으로 전환시켜 피스톤(7)을 실린더(6a)내에서 왕복운동시키게 되며, 이 피스톤(7)의 왕복운동에 의해 실린더(6a)내로 가스가 흡입,압축되어 토출된다.Reference numeral 14 is a sleeve inserted between the eccentric portion of the crankshaft and the connecting rod (SLEEVE), 15 is a piston pin for connecting the connecting rod and the piston. In the operation of the hermetic electric compressor as described above, first, when the current is applied, the rotor 4 rotates and the crank shaft 5 coupled thereto rotates. The connecting rod 8 coupled to the eccentric portion 5b of the crankshaft by the rotation of the crankshaft 5 converts the circular motion of the eccentric portion 5b into a linear movement, thereby converting the piston 7 into the cylinder 6a. The gas is sucked in, compressed and discharged into the cylinder 6a by the reciprocating motion of the piston 7.

한편, 상기 밀폐형 전동식 압축기에서 크랭크축(5)의 회전운동을 직선운동으로 변환시켜주는 컨넥팅로드(8)는 소정의 길이로 형성된 연결부(8a)와 상기 연결부(8a)의 일측에 연장형성되며 내부에 편심부(5b)가 삽입되는 관통공(8e)이 형성된 원형의 대단부(8b)와 상기 연결부(8a)의 타측에 연장형성되고 내부에 피스톤핀(15)이 삽입되는 관통공(8f)이 형성된 원형의 소단부(8c)를 구비하여 이루어져, 상기 편심부(5b)와 실린더(7)에 삽입된 피스톤핀(15)을 연결하게 된다. 상기 크랭크축 편심부(5b)와 대단부의 관통공(8e)사이에는 슬리이브(14)가 삽입된다.On the other hand, the connecting rod 8 for converting the rotational movement of the crankshaft 5 into a linear motion in the hermetic electric compressor is formed extending on one side of the connecting portion (8a) and the connecting portion (8a) formed in a predetermined length. A circular large end portion 8b having a through hole 8e into which an eccentric portion 5b is inserted therein, and a through hole 8f extending to the other side of the connecting portion 8a and having a piston pin 15 inserted therein. It is provided with a circular small end (8c) is formed, it is connected to the eccentric (5b) and the piston pin 15 inserted into the cylinder (7). The sleeve 14 is inserted between the crankshaft eccentric portion 5b and the through hole 8e of the large end portion.

상기 피스톤(7)은 소정의 길이를 갖는 환봉형으로 형성되며 일측 단부에 소정의 깊이로 상기 컨넥팅로드의 소단부(8c)가 삽입될 수 있도록 삽입홈(7a)가 형성되며 상기 삽입홈(7a)에 수직방향으로 관통되도록 환봉형의 일측 외주면에 핀삽입공(7b)이 형성되어 이루어진다. 그리고 상기 컨넥팅로드 소단부(8c)가 상기 피스톤의 삽입홈(7a)에 삽입되어 소단부(8e)와 핀삽입공(7b)을 일치시킨 상태에서 피스톤핀(15)을 삽입하여 결합된다.The piston 7 is formed in an annular rod shape having a predetermined length, and an insertion groove 7a is formed to insert the small end 8c of the connecting rod at a predetermined depth at one end thereof, and the insertion groove ( The pin insertion hole 7b is formed on one side outer circumferential surface of the round bar so as to penetrate in the vertical direction to 7a). And the connecting rod small end 8c is inserted into the insertion groove 7a of the piston and is coupled by inserting the piston pin 15 in a state where the small end 8e and the pin insertion hole 7b coincide.

상기한 바와 같이 컨넥팅로드(8)가 크랭크축의 편심부(5b)와 피스톤(7)을 연결하여 크랭크축(5)의 회전운동을 직선운동으로 변환시켜 피스톤(7)을 실린더(6a)내에서 왕복운동하면서 가스를 흡입,압축하여 토출시키게 되며, 이 과정에서 피스톤(7)이 큰 압축하중을 받게 되고 이로 인하여 피스톤(7) 및 이와 함께 슬라이딩되는 부분에 충분한 오일이 공급되어야 한다.As described above, the connecting rod 8 connects the eccentric portion 5b of the crankshaft and the piston 7 to convert the rotational movement of the crankshaft 5 into linear movement, thereby converting the piston 7 into the cylinder 6a. At the reciprocating motion, the gas is sucked, compressed and discharged. In this process, the piston 7 receives a large compressive load, and thus, sufficient oil must be supplied to the piston 7 and the sliding portion thereof.

그러나 상기 컨넥팅로드(8)와 피스톤(7)이 연결되는 부분에 오일이 공급되는 것은 크랭크축(5)이 회전함에 의해 밀폐용기(1)의 저면에 채워진 오일이 크랭크축(5)내부에 형성된 오일유로(5a) 및 오일그루브(G)를 통해 흡상되어 크랭크축(5) 단부를 통해 비산됨에 의해 컨넥팅로드(8)의 단부에 오일이 떨어져 오일이공급됨으로써 컨넥팅로드(8) 및 이에 연결,결합되는 피스톤핀(15)에 충분한 오일이 공급되지 않아 부품의 마모를 발생시키는 문제점이 있었다.However, the oil is supplied to the connecting rod 8 and the piston 7 is connected to the oil is filled in the bottom surface of the sealed container (1) by the crank shaft 5 is rotated in the crank shaft (5) The oil is supplied to the end of the connecting rod 8 by being sucked through the formed oil passage 5a and the oil groove G and scattered through the end of the crankshaft 5 so that oil is supplied to the connecting rod 8 and There is a problem in that the oil is not supplied to the piston pin 15 to be connected and coupled, causing wear of the parts.

따라서, 본 발명의 목적은 컨넥팅로드 및 이에 연결,결합되는 피스톤핀에 오일이 충분히 공급될 수 있도록 한 밀폐형 전동식 압축기의 오일공급구조를 제공함에 있다.Accordingly, an object of the present invention is to provide an oil supply structure of a hermetic electric compressor to allow sufficient oil to be supplied to a connecting rod and a piston pin connected and coupled thereto.

도 1은 일반적인 밀폐형 전동식 압축기의 일예를 도시한 단면도,1 is a cross-sectional view showing an example of a general hermetic electric compressor,

도 2는 본 발명의 밀폐형 전동식 압축기의 오일공급구조가 구비된 압축기의 단면도,2 is a cross-sectional view of a compressor with an oil supply structure of the hermetic electric compressor of the present invention;

도 3a는 본 발명의 밀폐형 전동식 압축기의 오일공급구조를 이루는 컨넥팅로드를 도시한 평면도,Figure 3a is a plan view showing a connecting rod constituting the oil supply structure of the hermetic electric compressor of the present invention,

도 3b는 본 발명의 밀폐형 전동식 압축기의 오일공급구조를 이루는 컨넥팅로드 및 피스톤핀을 도시한 정단면도,Figure 3b is a front sectional view showing the connecting rod and the piston pin forming the oil supply structure of the hermetic electric compressor of the present invention,

도 4는 본 발명의 밀폐형 전동식 압축기의 오일공급구조를 이루는 피스톤핀을 도시한 정면도.Figure 4 is a front view showing the piston pin forming the oil supply structure of the hermetic electric compressor of the present invention.

(도면의 주요부분에 대한 부호의 설명)(Explanation of symbols on the main parts of drawing

5 ; 크랭크축 5a ; 오일유로5; Crankshaft 5a; Oil euro

5b ; 편심부 6a ; 실린더5b; Eccentric 6a; cylinder

7 ; 피스톤 8 ; 컨넥팅로드7; Piston 8; Connecting rod

8b ; 대단부 8c ; 소단부8b; Large end 8c; Small edge

8g ; 오일통로 15 ; 피스톤핀8g; Oil channel 15; Piston pin

l5a ; 원형 오일글루브 l5b ; 나선형 오일글루브l5a; Circular oil groove l5b; Spiral oil groove

상기한 바와 같은 본 발명의 목적을 달성하기 위하여 실린더에 삽입되는 피스톤에 컨넥팅로드의 소단부가 삽입되어 피스톤핀에 의해 결합되고, 내부에 오일이 흡상되는 오일유로가 형성된 크랭크축의 편심부에 상기 컨넥팅로드의 대단부가 결합되어, 크랭크축의 회전운동이 컨넥팅로드에 의해 직선운동으로 변환되어 피스톤을 실린더 내에서 왕복운동시킴에 의해 가스를 흡입,압축시켜 토출시키는 밀폐형 전동식 압축기에 있어서; 상기 컨넥팅로드의 내부에 대단부의 관통공과 그 소단부의 관통공을 관통시키는 오일통로와, 상기 컨넥팅로드 소단부의 관통공에 결합되는 피스톤핀의 외주면에 상기 오일통공과 연통되도록 환형으로 형성되는 원형 오일글루브와, 상기 원형 오일글루브와 연통되도록 그 원형 오일글루브의 양측에 위치하는 피스톤핀의 외주면에 각각 형성되는 나선형 오일글루브로 이루어진 것을 특징으로 하는 밀폐형 전동식 압축기의 오일공급구조가 제공된다.In order to achieve the object of the present invention as described above, the small end of the connecting rod is inserted into the piston inserted into the cylinder and is coupled by the piston pin, and the eccentric portion of the crankshaft having an oil flow path in which oil is sucked inside is formed. A hermetic electric compressor coupled to a large end of the connecting rod, wherein the rotational movement of the crankshaft is converted into a linear motion by the connecting rod to suck, compress and discharge the gas by reciprocating the piston in the cylinder; An oil passage for penetrating the through hole of the large end portion and the through hole of the small end portion inside the connecting rod and an outer circumferential surface of the piston pin coupled to the through hole of the connecting rod small end portion are formed in an annular shape so as to communicate with the oil through hole. The oil supply structure of the hermetic electric compressor is provided, which comprises a circular oil groove, and spiral oil grooves formed on the outer circumferential surfaces of the piston pins located at both sides of the circular oil groove so as to communicate with the circular oil groove. .

이하, 본 발명의 밀폐형 회전식 압축기의 오일공급구조를 첨부도면에 도시한 실시예에 따라 설명하면 다음과 같다.Hereinafter, the oil supply structure of the hermetic rotary compressor according to the embodiment shown in the accompanying drawings will be described.

본 발명의 밀폐형 회전식 압축기의 오일공급구조는, 도 2에 도시한 바와 같이, 실린더에 삽입되는 피스톤(7)에 컨넥팅로드의 소단부(8c)가 삽입되어 피스톤핀(15)에 의해 결합되고, 내부에 오일이 흡상되는 오일유로(5a)가 형성된 크랭크축의 편심부(5b)에 상기 컨넥팅로드의 대단부(8b)가 결합되며, 상기 컨넥팅로드(8)의 내부에 대단부(8b)와 소단부(8c)를 관통시키는 오일통로(8g)가 형성되고, 상기 컨넥팅로드의 소단부(8c)에 결합되는 피스톤핀(15)에 오일글루브가 형성되어 이루어진다.The oil supply structure of the hermetic rotary compressor of the present invention, as shown in Figure 2, the small end (8c) of the connecting rod is inserted into the piston (7) inserted into the cylinder is coupled by the piston pin 15 A large end portion 8b of the connecting rod is coupled to an eccentric portion 5b of the crankshaft having an oil flow passage 5a in which oil is sucked inside, and a large end portion 8b inside the connecting rod 8. ) And an oil passage 8g penetrating the small end portion 8c, and an oil groove is formed on the piston pin 15 coupled to the small end portion 8c of the connecting rod.

상기 컨넥팅로드(8)는, 도 3a, 3b에 도시한 바와 같이, 소정의 길이로 형성된 연결부(8a)와 상기 연결부(8a)의 일측에 연장 형성되며 내부에 편심부(5b)가 삽입되는 관통공(8e)이 형성된 원형의 대단부(8b)와 상기 연결부(8a)의 타측에 연장 형성되고 내부에 피스톤핀(15)이 삽입되는 관통공(8f)이 형성된 원형의 소단부(8c)를 구비하여 이루어지며, 상기 연결부(8a)의 내부로 상기 대단부의 관통공(8e)과 소단부의 관통공(8f)을 연통시키는 오일통로(8g)가 형성된다.As shown in FIGS. 3A and 3B, the connecting rod 8 extends on one side of the connecting portion 8a and the connecting portion 8a formed to a predetermined length, and an eccentric portion 5b is inserted therein. Circular small end portion 8c having a large circular end portion 8b having a through hole 8e formed therein, and a through hole 8f having a piston pin 15 inserted therein, formed on the other side of the connecting portion 8a. An oil passage (8g) is formed to communicate the through hole (8e) of the large end portion and the through hole (8f) of the small end portion into the connecting portion (8a).

그리고 상기 피스톤핀(15)은, 도 4에 도시한 바와 같이, 상기 소단부의 관통공(8f)에 삽입되는 직경과 소정의 길이를 갖도록 형성된다. 그리고 상기 피스톤핀(15)의 외주면에 오일글루브가 형성되며, 상기 오일글루브는 피스톤핀(15)이 소단부(8c)에 삽입된 상태에서 컨넥팅로드(8)내에 형성된 오일통로(8g)와 연통되는 원형 오일글루브(15a)와 상기 원형 오일글루브(15a)의 상하측으로 상기 원형 오일글루브(15a)와 연통되게 형성된 나선형 오일글루브(15b)로 이루어진다.And the piston pin 15, as shown in Figure 4, is formed to have a diameter and a predetermined length that is inserted into the through hole (8f) of the small end portion. An oil groove is formed on an outer circumferential surface of the piston pin 15, and the oil groove has an oil passage formed in the connecting rod 8 in a state where the piston pin 15 is inserted into the small end portion 8c. The circular oil groove 15a and the spiral oil groove 15b formed to communicate with the circular oil groove 15a on the upper and lower sides of the circular oil groove 15a.

이하, 본 발명의 밀폐형 전동식 압축기 오일공급구조의 작용효과를 설명하면 다음과 같다.Hereinafter, the operation and effect of the hermetic electric compressor oil supply structure of the present invention will be described.

본 발명의 피스톤 오일공급구조는 크랭크축(5)이 회전함에 의해 밀폐용기(1)의 저면에 채워진 오일이 크랭크축(5)의 내부에 형성된 오일유로(5a)를 통해 흡상하여 크랭크축의 편심부(5b)를 통해 비산된다. 그리고 오일유로(5a)를 통해 흡상된 오일의 일부는 컨넥팅로드(8)에 전달되며 이 컨넥팅로드(8)에 전달된 오일은 컨넥팅로드의 대단부 관통공(8e)를 통해 오일통로(8g)로 유입되어 오일통로(8g)를 통해 피스톤핀(15)의 오일글루브로 유입된다. 상기 피스톤핀(15)의 오일글루브로 오일이 유입됨으로써 컨넥팅로드의 소단부(8c)와 피스톤핀(15)사이의 윤활작용이 원활하게 이루어지게 된다. 한편 상기 피스톤핀(15)에 형성된 오일글루브가 원형 오일글루브(15a)와 나선형 오일글루브(15b)로 형성됨으로써 컨넥팅로드(8)와 피스톤핀(15)이 상대 운동할 경우 오일이 공급되는 부분이 어긋나지 않고 항상 컨넥팅로드(8)의 소단부 관통공(8f)과 그 소단부 관통공(8f)에 삽입된 피스톤핀(15)의 외주면사이에 공급된다.In the piston oil supply structure of the present invention, the oil filled in the bottom surface of the sealed container 1 as the crank shaft 5 rotates is sucked up through the oil passage 5a formed in the crank shaft 5, and the eccentric portion of the crank shaft is rotated. Scattered through (5b). A portion of the oil drawn up through the oil passage 5a is transferred to the connecting rod 8, and the oil delivered to the connecting rod 8 passes through the oil passage through the large end through hole 8e of the connecting rod 8. 8g is introduced into the oil groove of the piston pin 15 through the oil passage 8g. The oil flows into the oil groove of the piston pin 15 so that lubrication between the small end 8c of the connecting rod and the piston pin 15 is smoothly performed. On the other hand, the oil groove formed on the piston pin 15 is formed by the circular oil groove 15a and the spiral oil groove 15b so that when the connecting rod 8 and the piston pin 15 move relative, The part to be supplied is not shifted and is always supplied between the small end through hole 8f of the connecting rod 8 and the outer circumferential surface of the piston pin 15 inserted into the small end through hole 8f.

본 발명은 마찰력을 많이 받는 컨넥팅로드(8)와 피스톤핀(15)사이에 오일공급이 원활하게 이루어짐으로써 부품의 마모를 방지하게 된다.The present invention prevents abrasion of parts by smoothly supplying oil between the connecting rod 8 and the piston pin 15 that receive a lot of friction.

이상에서 설명한 바와 같이, 본 발명에 의한 밀폐형 전동식 압축기의 오일공급구조는 가스를 흡입하고 압축하여 토출시키는 압축기구부에서 압축하중을 많이 받으며 슬라이딩이 이루어지는 피스톤과 이에 결합되는 컨넥팅로드 및 피스톤핀에 충분한 오일이 공급됨으로써 슬라이딩부분의 마모를 감소시켜 부품의 수명을 연장시킬 뿐만 아니라 신뢰성을 향상시킬 수 있는 효과가 있다.As described above, the oil supply structure of the hermetic electric compressor according to the present invention receives a lot of compressive load from the compression mechanism portion for sucking, compressing and discharging gas, and is sufficient for the piston and the connecting rod and the piston pin coupled thereto. The oil is supplied to reduce the wear of the sliding portion to extend the life of the parts, as well as to improve the reliability.

Claims (1)

실린더에 삽입되는 피스톤에 컨넥팅로드의 소단부가 삽입되어 피스톤핀에 의해 결합되고, 내부에 오일이 흡상되는 오일유로가 형성된 크랭크축의 편심부에 상기 컨넥팅로드의 대단부가 결합되어, 크랭크축의 회전운동이 컨넥팅로드에 의해 직선운동으로 변환되어 피스톤을 실린더내에서 왕복운동시킴에 의해 가스를 흡입,압축시켜 토출시키는 밀폐형 전동식 압축기에 있어서; 상기 컨넥팅로드의 내부에 대단부의 관통공과 그 소단부의 관통공을 관통시키는 오일통로와, 상기 컨넥팅로드 소단부의 관통공에 결합되는 피스톤핀의 외주면에 상기 오일통공과 연통되도록 환형으로 형성되는 원형 오일글루브와, 상기 원형 오일글루브와 연통되도록 그 원형 오일글루브의 양측에 위치하는 피스톤핀의 외주면에 각각 형성되는 나선형 오일글루브로 이루어진 것을 특징으로 하는 밀폐형 전동식 압축기의 오일공급구조.The small end of the connecting rod is inserted into the piston inserted into the cylinder and is coupled by the piston pin, and the large end of the connecting rod is coupled to the eccentric portion of the crank shaft in which an oil flow path for oil is sucked inside is engaged, thereby rotating the crank shaft. A hermetic electric compressor in which a motion is converted into a linear motion by a connecting rod to suck, compress and discharge gas by reciprocating a piston in a cylinder; An oil passage for penetrating the through hole of the large end portion and the through hole of the small end portion inside the connecting rod and an outer circumferential surface of the piston pin coupled to the through hole of the connecting rod small end portion are formed in an annular shape so as to communicate with the oil through hole. The oil supply structure of the hermetic electric compressor, characterized in that consisting of a spiral oil groove formed on the outer circumferential surface of the piston pins located on both sides of the circular oil groove so as to communicate with the circular oil groove.
KR1019980006182A 1998-02-26 1998-02-26 Structure for supplying oil of hermetic motor compressor KR100301469B1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109083826A (en) * 2017-06-14 2018-12-25 日立空调·家用电器株式会社 Hermetic type compressor and the equipment for having used the hermetic type compressor

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Publication number Priority date Publication date Assignee Title
KR100736070B1 (en) * 2001-12-18 2007-07-06 삼성광주전자 주식회사 Lubricating system for connecting rod of compressor
CN111664162A (en) * 2020-06-10 2020-09-15 东风柳州汽车有限公司 Connecting rod assembly
EP4299906A1 (en) * 2022-06-29 2024-01-03 Arçelik Anonim Sirketi A compressor comprising a connecting rod having a channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109083826A (en) * 2017-06-14 2018-12-25 日立空调·家用电器株式会社 Hermetic type compressor and the equipment for having used the hermetic type compressor

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