KR950002244Y1 - Crank shaft of compressor - Google Patents

Crank shaft of compressor Download PDF

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Publication number
KR950002244Y1
KR950002244Y1 KR92006641U KR920006641U KR950002244Y1 KR 950002244 Y1 KR950002244 Y1 KR 950002244Y1 KR 92006641 U KR92006641 U KR 92006641U KR 920006641 U KR920006641 U KR 920006641U KR 950002244 Y1 KR950002244 Y1 KR 950002244Y1
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South Korea
Prior art keywords
crankshaft
drill hole
shaft
frame
compressor
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KR92006641U
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Korean (ko)
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KR930023851U (en
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김종혁
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이헌조
주식회사 금성사
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Priority to KR92006641U priority Critical patent/KR950002244Y1/en
Publication of KR930023851U publication Critical patent/KR930023851U/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component 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

Abstract

내용 없음.No content.

Description

밀폐형 전동압축기의 크랭크샤프트Crankshaft of Hermetic Electric Compressor

제1도는 종래 일반적인 밀폐형 전동압축기의 구성도.1 is a block diagram of a conventional general hermetic electric compressor.

제2도는 종래 일반적인 밀폐형 전동압축기의 크랭크샤프트의 구성 및 작용상태도로서 (a)는 요부구성 단면도, (b)는 힘의 작용 상태도, (c)는 파단 예시도.2 is a configuration and working state diagram of a crankshaft of a conventional general hermetic electric compressor, (a) is a sectional view of the main portion, (b) is a working state diagram of the force, (c) is an illustration of breakage.

제3도는 본 고안 크랭크샤프트의 구성 상태도.3 is a configuration diagram of the crankshaft of the present invention.

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

4 : 크랭크샤프트 4a : 편심부4: crankshaft 4a: eccentric portion

4b : 축부드릴구멍 4c : 핀부드릴구멍4b: Shaft drill hole 4c: Pin drill hole

4d : 오릴그루브 8 : 프레임4d: Orient Groove 8: Frame

본 고안은 밀폐형 전동압축기의 크랭크샤프트에 관한 것으로, 크랭크 샤프트의 작동부위에 윤활유를 공급하기 위한 윤활유 공급공을 크랭크 샤프트의 응력집중지점으로 부터 이격시켜 동작중 크랭크샤프트가 파단되는 것을 미연에 방지하기 위한 것이다.The present invention relates to a crankshaft of a hermetic electric compressor, and to prevent the crankshaft from being broken during operation by separating a lubricant supply hole for supplying lubricant to the operating part of the crankshaft from the stress concentration point of the crankshaft. It is for.

종래 일반적인 밀폐형 전동압축기의 첨부도면 제1도에 도시된 바와 같이 밀폐용기(1)내에 모터고정자(2)와 회전자(3)로 구성되는 전동기구부를 장착하고, 상기 회전자(3)에 크랭크샤프트(4)를 열박음으로 고착하며, 상기 크랭크샤프트(4)에 슬라이더(5)와 피스톤(6) 및 실린더(7), 프레임(8)등을 조립하여 크랭크샤프트(4)의 회전시 피스톤(6)이 실린더(7)내에서 왕복운동하도록 구성하였다.As shown in FIG. 1 of the accompanying drawings of a conventional general hermetic electric compressor, an electric mechanism part including a motor stator 2 and a rotor 3 is mounted in a hermetic container 1, and the rotor 3 is cranked. The shaft 4 is fixed by shrinking, and the piston 5 at the time of rotation of the crankshaft 4 is assembled by assembling the slider 5, the piston 6, the cylinder 7, the frame 8, and the like to the crankshaft 4. (6) was configured to reciprocate in the cylinder (7).

이와같은 구성의 밀폐형 전동압축기는 밀폐용기(1)내부를 냉각 및 윤활하기 위한 냉동기유가 밀폐용기(1)의 내부바닥에 고여서 전동기구부의 회전자(3)가 회전하면 이와 축착된 크랭크샤프트(4)가 회전하면서 각 구동부에 윤활되도록 하였으며, 외부전원을 압축기에 인가하기 위해 밀폐용기(1)내에 단자부(9)를 형성하고 있다.In the hermetic electric compressor of such a configuration, the crankshaft condensed with the refrigerator oil for cooling and lubricating the sealed container 1 is accumulated on the inner bottom of the sealed container 1 when the rotor 3 of the electric machine part rotates. 4) is rotated to lubricate each drive unit, and the terminal unit 9 is formed in the sealed container 1 to apply external power to the compressor.

즉, 상기 단자부(9)에 전원을 인가하면 회전자(3)의 회전에 따라 크랭크 샤프트(4)가 회전하고 이때 크랭크샤프트 편심부(4a)에 조립되어 있는 슬라이더(5)의 상호운동에 의해 피스톤(6)이 왕복운동하며, 이 왕복운동에 의해 냉매가스는 실린더(7)내로 흡입되어 고온고압으로 압축되게 된다.That is, when power is applied to the terminal portion 9, the crankshaft 4 rotates according to the rotation of the rotor 3, and at this time, by the mutual movement of the slider 5 assembled to the crankshaft eccentric portion 4a. The piston 6 reciprocates, and the reciprocating motion causes the refrigerant gas to be sucked into the cylinder 7 and compressed to high temperature and high pressure.

상기와 같이 냉매가스를 압축하는 과정에서 크랭크샤프트(4)는 하단이 밀폐용기(1)의 바닥에 고인 냉동기유에 잠김상태로 회동되어 회전력으로 발생되는 원심력에 의하여 냉동기유가 상측으로 펌핑되어서 각 구동부에 비산되어 윤활 및 냉각을 하게 되는 것이다.In the process of compressing the refrigerant gas as described above, the crankshaft (4) is rotated in a state where the lower end is locked in the refrigerator oil stuck to the bottom of the sealed container (1), and the refrigeration oil is pumped upward by centrifugal force generated by the rotational force to each driving unit. It is scattered and lubricated and cooled.

그러나 상기한 종래의 밀폐형 전동압축기는 크랭크샤프트(4)에 냉동기유를 펌핑하기 위해 제2도에 도시한 바와같이 내부에는 축부드릴구멍(4b)과 핀부드릴구멍(4c)을 천설하고 외연에 오일그루브(4d)를 요설하여 이들을 목부오일홈(4k)에서 연통되어 일치되도록 형성함으로써 크랭크샤프트(4)가 회동할때 원심력에 의하여 밀폐용기(1)바닥에 고인 냉동기유가 축부드릴 구멍(4b)가 핀부드릴구멍(4c)을 통하여 각 구동부에 비산되어 윤활 및 냉각시키게 되는데 여기서 프레임(8)의 면취부(8a)와 크랭크샤프트(4)의 최소 단면부위인(A)가 일치되어 이 부위에 응력집중이 발생되고, 이로 인하여 피스톤(6)이 압력 F를 받으면 프레임(8)의 면취부(8a)에서 반력 R이 작용하게 두 힘에 의한 모우멘트(M)으로 인하여 결국 크랭크샤프트(4)의 목부인 A지점에 전단 응력 집중현상이 발생되어 파단(F)이 발생된다. [제1도의 (c)참조]However, the conventional hermetic electric compressor is installed with a shaft drill hole 4b and a pin drill hole 4c therein as shown in FIG. 2 to pump the refrigeration oil to the crankshaft 4, and the oil on the outer edge thereof. The grooves 4d are formed in such a manner that they are communicated with the neck oil grooves 4k and formed so that the freezer oil accumulated in the bottom of the sealed container 1 by the centrifugal force when the crankshaft 4 rotates is provided with a shaft drill hole 4b. It is scattered and lubricated and cooled by the driving part through the pin drill hole 4c. Here, the chamfering part 8a of the frame 8 and the minimum cross-sectional area A of the crankshaft 4 coincide with each other to stress the part. Concentration occurs, which causes the reaction force R to act on the chamfering portion 8a of the frame 8 when the piston 6 receives the pressure F. As a result of the moment M caused by the two forces, the crankshaft 4 Shear stress concentration at the A point of the neck Is generated to cause breakage (F). [See (c) in Figure 1]

이와 같은 현상은 전단응력집중현상이 발생되는 A지점에 핀부드릴구멍과 축부 드릴 구멍 및 축부오일그루브가 일치되는 목부오일홈을 형성하여 이 부분이 취약해 지므로써 더욱 심하게 일어났었다.This phenomenon occurred more severely by forming a neck oil groove where the pin drill hole, the shaft drill hole, and the shaft oil groove coincide at the point A where shear stress concentration occurs.

본 고안은 상기한 종래의 제결함을 감안하여 크랭크샤프트 각 동작부위에 오일을 비산시켜 공급하기 위한 목부오일홈의 위치를 변경시킴으로써 크랭크샤프트의 파단을 방지하는 등 사용수명을 연장시키도록 하는데 그 목적을 둔 것으로 이를 첨부도면에 의거 상세히 설명하면 다음과 같다.The present invention aims to extend the service life of the crankshaft by preventing the breakage of the crankshaft by changing the position of the neck oil groove for scattering and supplying oil to each crankshaft operating part in view of the above conventional defects. If it described in detail based on the accompanying drawings as follows.

밀폐형 전동압축기에 있어서, 프레임(8)에 지지되어 전등모터의 구동력으로 구동되면서 피스톤(6)을 왕복시키는 크랭크샤프트(4)의 내부에 제3도에 도시된 바와 같이 축부드릴 구멍(4b)과 핀부드릴구멍(4c)을 성형하고, 상기 프레임(8)과 결합되는 크랭크샤프트(4)의 외연에는 축부오일그루브(4d)를 형성하되, 상기 축부드릴구멍(4b)과 핀부드릴구멍(4c) 및 축부오일그루브(4d)가 일치되어 연통되는 목부 오일홈(44)을 프레임(8)내측으로 이동시켜 면취부(8a)가 이격되도록 크랭크샤프트(4)의 응력집중지점의 파단을 방지하도록 한 것이다.In the hermetic electric compressor, the shaft drill hole 4b is provided in the crankshaft 4 inside the crankshaft 4 which is supported by the frame 8 and driven by the driving force of the light motor to reciprocate the piston 6. A pin part drill hole 4c is formed and a shaft oil groove 4d is formed on the outer edge of the crankshaft 4 engaged with the frame 8, but the shaft part drill hole 4b and the pin part drill hole 4c are formed. And axial oil grooves 4d are moved in communication with the neck oil grooves 44 inwardly in the frame 8 to prevent breakage of the stress concentration point of the crankshaft 4 so that the chamfers 8a are spaced apart. will be.

즉, 크랭크샤프트(4)의 급유구조는 기존의 크랭크샤프트(4)의 급유구조에서 축부드릴구멍(4b)과 판부드릴구멍(4c) 및 크랭크샤프트(4) 외연에 형성된 축부오일그루브(4d)가 일치하는 목부오일홈(44)을 프레임(8)내측으로 이동시켜 프레임(8)상단에 형성된 면취부(8a)와 일정한 거리로 이격되도록 형성함으로써 크랭크샤프트(4)가 쉽게 파단되는 것을 방지한 것이다.That is, the lubrication structure of the crankshaft 4 is the axial oil groove 4d formed at the outer periphery of the shaft drill hole 4b, the plate drill hole 4c, and the crankshaft 4 in the existing oil supply structure of the crankshaft 4. Is moved so that the neck oil groove 44 coincides with the inner side of the frame 8 so as to be spaced apart from the chamfer 8a formed at the upper end of the frame 8 by a predetermined distance, thereby preventing the crankshaft 4 from being easily broken. will be.

이와같은 구성된 본 고안을 첨부도면 제1도에 도시된 바와 같은 밀폐형 전동압축기에 설치하여 모터고정자(2)에 전원을 인가시키면 회전자(3)가 구동되면서 상기 회전자(3)가 축착된 크랭크샤프트(4)가 회전하게 되어 여기에 설치된 피스톤(6)이 왕복 동작하면서 냉매를 압축시키게 된다.When the present invention configured as described above is attached to the hermetic electric compressor as shown in FIG. 1 and the power is applied to the motor stator 2, the rotor 3 is driven and the crank on which the rotor 3 is condensed. The shaft 4 is rotated so that the piston 6 installed therein compresses the refrigerant while reciprocating.

이때 크랭크샤프트(4)에 형성된 축부드릴구멍(4b)과 오일그루브(4d)를 통하여 밀폐용기(1)바닥에 고여있던 냉동기유가 흡상되어서 축수부를 윤활시킴과 동시에 핀부드릴구멍(4c)을 통해 압축기 각부에 냉동기유를 펌핑 급유하게 된다.At this time, the coolant oil accumulated in the bottom of the sealed container 1 is sucked up through the shaft drill hole 4b and the oil groove 4d formed in the crankshaft 4 to lubricate the bearing part and at the same time the compressor through the pin drill hole 4c. The refrigeration oil is pumped and refrigerated in each part.

상기와 같이 동작될때 피스톤(6)이 냉매를 압축시 크랭크샤프트(4)에 입출력인 힘 F가 작용하게 되며 이때 상기 힘 F가 집중적으로 작용되는 크랭크샤프트(4)의 프레임(8)상단 면취부(8a)와 결합되는 부위에 목부오일홈을 형성하지 않으므로써 전단력과 굽힘모멘트를 분산 작용하게 하는 것이다.When operated as described above, when the piston 6 compresses the refrigerant, an input force F acts on the crankshaft 4, and at this time, an upper chamfered portion of the frame 8 of the crankshaft 4 in which the force F is concentrated. The shear force and the bending moment are dispersed by not forming the neck oil groove in the part to be combined with (8a).

즉, 본 고안의 크랭크샤프트를 밀폐형 냉동압축기에 장착하였던 기존의 밀폐형 냉동압축기에서 발생한 크랭크샤프트의 목부에 응력이 집중되어 파단되던 문제를 해결하게 되므로 냉장고의 고장을 방지하고 고객으로부터 신뢰받는 양질의 제품을 제작할 수 있게 된다.In other words, it solves the problem of stress concentration and fracture in the neck of the crankshaft generated in the conventional hermetic refrigeration compressor which installed the crankshaft of the present invention in the hermetic refrigeration compressor. You will be able to produce.

상기한 바와 같이 본 고안은 간단한 구조변경만으로 크랭크샤프트의 강도을 보강하여 사용중 크랭크샤프트의 파단으로 발생되는 냉장고의 고장을 미연에 방지하여 상품의 신뢰성을 향상시킬 수 있는 신규 유용의 고안이다.As described above, the present invention is a novel useful design that can improve the reliability of the product by preventing the failure of the refrigerator caused by the breakage of the crankshaft in use by reinforcing the strength of the crankshaft only by a simple structural change.

Claims (1)

프레임에 지지되어 전동모터의 구동력으로 구동되면서 피스톤을 왕복시키는 크랭크샤프트의 내부에 축부드릴구멍과 핀부드릴구멍을 천설하고, 프레임과 결합되는 외연에는 축부오일그루브를 형성하되, 상기 축부드릴 구멍과 판부드릴구멍 및 축부오일그루브가 일치되어 연통되는 목부오일홈을 프레임 내측으로 이동시켜 프레임 면취부와 이격되도록 구성함을 특징으로 하는 밀폐형 전동압축기의 크랭크 샤프트.The shaft drill hole and the pin drill hole are installed inside the crankshaft which reciprocates the piston while being driven by the driving force of the electric motor, and the shaft drill hole and the plate part are formed on the outer edge coupled with the frame. The crankshaft of the hermetic electric compressor, characterized in that the drill hole and the shaft oil groove is matched to move the neck oil groove in communication with the frame inside the frame chamfer.
KR92006641U 1992-04-22 1992-04-22 Crank shaft of compressor KR950002244Y1 (en)

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KR950002244Y1 true KR950002244Y1 (en) 1995-03-29

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