KR20030083810A - Rotary comrressor - Google Patents

Rotary comrressor Download PDF

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Publication number
KR20030083810A
KR20030083810A KR1020020021989A KR20020021989A KR20030083810A KR 20030083810 A KR20030083810 A KR 20030083810A KR 1020020021989 A KR1020020021989 A KR 1020020021989A KR 20020021989 A KR20020021989 A KR 20020021989A KR 20030083810 A KR20030083810 A KR 20030083810A
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KR
South Korea
Prior art keywords
casing
cylinder
rotary axis
rotor
rolling piston
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Application number
KR1020020021989A
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Korean (ko)
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KR100459450B1 (en
Inventor
박기원
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엘지전자 주식회사
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Priority to KR10-2002-0021989A priority Critical patent/KR100459450B1/en
Publication of KR20030083810A publication Critical patent/KR20030083810A/en
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Publication of KR100459450B1 publication Critical patent/KR100459450B1/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/023—Lubricant distribution through a hollow driving shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • F04C2240/603—Shafts with internal channels for fluid distribution, e.g. hollow shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PURPOSE: A hermetic rotary compressor is provided to prevent generation of torsion and noise due to structural imbalance of a rotary axis. CONSTITUTION: A compressor includes a casing having a storage space formed therein; an electromotive mechanism comprising a stator and a rotor installed in the casing; a rotary axis forcibly inserted to a center of the rotor; a circular cylinder fixed on an inner circumferential surface of the casing; a first bearing and a second bearing attached on both sides of the cylinder, and having the rotary axis penetrate so as to support a lower end of the rotary axis in such a manner that the lower end of the rotary axis rotates; a rolling piston sliding on the rotary axis, rotating, and eccentrically revolving in the cylinder; a vane forcibly abutted with a periphery of the rolling piston, and linearly moving when the rolling piston revolves to divide the cylinder into a suction space and a compression space; and a supporting unit(100) including a support part(110) which supports an upper end of the rotary axis protruding toward the rotor in such a manner that the upper end of the rotary axis rotates, and a fixing part(120) fixing the support part on an inside of the casing.

Description

밀폐형 회전식 압축기{ROTARY COMRRESSOR}Hermetic rotary compressor {ROTARY COMRRESSOR}

본 발명은 밀폐형 회전식 압축기에 관한 것으로서, 상세하게는, 회전축의 상단부에 베어링을 추가함으로써 압축기의 초기구동시 회전축에 가해지는 과부하를 해소하기 위한 구조에 관한 것이다.The present invention relates to a hermetic rotary compressor, and more particularly, to a structure for releasing an overload applied to the rotating shaft during initial driving of the compressor by adding a bearing to the upper end of the rotating shaft.

일반적으로 에어컨 등에 적용되는 밀폐형 회전식 압축기는 전동기구부에 일체된 회전축에 압축기구부의 롤링피스톤이 편심되게 결합되고, 그 롤링피스톤이 원형 실린더 내에서 선회운동을 하면서 냉매가스를 흡입 압축하여 토출시키는 것이다.In general, a hermetic rotary compressor applied to an air conditioner is eccentrically coupled with a rolling piston of a compression mechanism unit to a rotating shaft integrated with an electric motor unit, and the rolling piston sucks and discharges refrigerant gas while rotating in a circular cylinder.

도 1 및 도 2는 종래의 밀폐형 회전식 압축기의 구조를 도시한 것으로서, 도 1은 전체의 구조를 도시한 단면도이고, 도 2는 회전축의 구조를 도시한 측면도이다.1 and 2 show the structure of a conventional hermetic rotary compressor, Figure 1 is a cross-sectional view showing the overall structure, Figure 2 is a side view showing the structure of the rotating shaft.

도시된 바와 같이 종래의 밀폐형 회전식 압축기는, 소정량의 오일이 채워지고 흡입관(SP)과 토출관(DP)이 구비되는 케이싱(1)의 내부에 전동기구부인 고정자(2) 및 회전자(3)가 설치되고, 그 중 회전자(3)의 중심에는 회전축(4)이 압입되며, 그 회전축(4)의 하부에는 압축기구부가 설치되어 이루어져 있다.As shown in the related art, the conventional hermetic rotary compressor includes a stator 2 and a rotor 3 which are electric motor parts inside a casing 1 in which a predetermined amount of oil is filled and the suction pipe SP and the discharge pipe DP are provided. The rotating shaft 4 is press-fitted in the center of the rotor 3, and the compression mechanism part is provided in the lower part of the rotating shaft 4 in this case.

상기 압축기구부는 케이싱(1)의 내주면에 고정되어 흡입관(SP)과 연통되는 원형의 실린더(5)와, 그 실린더(5)의 양측면에 밀착되는 동시에 회전축(4)이 관통되는 제1베어링(6A) 및 제2베어링(6B)과, 상기 화전축(4)에 접동되어 자전하면서실린더(5)내에서 편심 회전하는 롤링피스톤(7)과, 그 롤링피스톤(7)의 외주면에 압접되어 롤링피스톤(7)의 선회운동시 직선운동을 하면서 실린더(5)를 흡입공간과 압축공간으로 구분하는 베인(미도시)을 포함하여 이루어져 있다.The compression mechanism is fixed to the inner circumferential surface of the casing (1) is a circular cylinder (5) in communication with the suction pipe (SP), the first bearing is in close contact with both sides of the cylinder (5) and the rotating shaft (4) is penetrated ( 6A) and the second bearing 6B, the rolling piston 7 which is eccentrically rotated in the cylinder 5 while being rotated and rotated by the fire shaft 4 and the outer circumferential surface of the rolling piston 7 to be pressed and rolled. It comprises a vane (not shown) for dividing the cylinder 5 into a suction space and a compression space while the linear movement during the pivoting movement of the piston (7).

상기 회전축(4)의 내부에는 오일유로(4a)가 축방향으로 길게 관통되도록 형성되고, 그 오일유로(4a)의 하단에는 케이싱(1)에 채워진 오일을 흡상하는 오일피더(미도시)가 장착되어 있다.The oil passage 4a is formed to penetrate long in the axial direction inside the rotary shaft 4, and an oil feeder (not shown) is installed at the lower end of the oil passage 4a to suck up the oil filled in the casing 1. It is.

도면중 미설명 부호인 6a는 토출구멍, 8은 토출밸브 조립체, 9는 토출머플러, A는 어큐뮬레이터이다.In the figure, reference numeral 6a denotes a discharge hole, 8 denotes a discharge valve assembly, 9 denotes a discharge muffler, and A denotes an accumulator.

상기와 같이 구성된 종래의 밀폐형 회전식 압축기의 동작은 다음과 같다.The operation of the conventional hermetic rotary compressor configured as described above is as follows.

즉, 상기 고정자(2)에 전원이 인가되면 그 전원의 인가에 따라 회전자(3)가 고정자(2)의 내부에서 회전을 하게 되고, 이와 함께 회전축(4)이 회전을 하면서 롤링피스톤(7)이 실린더(5)내에서 편심 회전을 하게 되며, 그 롤링피스톤(7)의 편심회전에 따라 냉매가스가 실린더(5)의 흡입공간으로 흡입되었다가 일정압력까지 지속적으로 압축되고, 그 실린더(5)의 압축공간 압력이 임계압력을 지나 케이싱(1)내의 압력보다 고압이 되는 순간 상기 제1베어링(6A)에 장착된 토출밸브(9)가 열리면서 압축가스가 압축공간에서 케이싱(1)의 내부로 토출되며, 이 토출가스는 케이싱(1)과 고정자(2) 사이의 틈새 또는 고정자(2)와 회전자(3) 사이의 틈새 등을 통해 상부로 이동하여 토출관(DP)을 거쳐 냉동사이클시스템으로 배출된다.That is, when power is applied to the stator 2, the rotor 3 rotates inside the stator 2 according to the application of the power, and the rotating shaft 4 rotates while the rolling piston 7 rotates. ) Eccentric rotation in the cylinder (5), the refrigerant gas is sucked into the suction space of the cylinder (5) in accordance with the eccentric rotation of the rolling piston (7) is continuously compressed to a constant pressure, the cylinder ( At the moment when the compression space pressure of 5) becomes higher than the pressure in the casing 1 through the critical pressure, the discharge valve 9 mounted on the first bearing 6A is opened, and compressed gas is discharged from the casing 1 in the compression space. It is discharged to the inside, and the discharge gas moves upward through a gap between the casing 1 and the stator 2 or a gap between the stator 2 and the rotor 3 to freeze through the discharge pipe DP. Discharged into the cycle system.

이때, 상기 케이싱(1)의 내부에 채워져 있던 오일은 회전축(4)의 오일피더(미도시) 및 오일유로(4a)에 의해 상단까지 흡상되었다가 비산되면서 각 습동부를윤활시키는 동시에 전동기구부를 냉각시키면서 다시 케이싱(1)의 바닥으로 흘러 내리게 되는 바, 이와 같이 흘러 내리는 오일은 제2베어링(6B)의 내주부에 형성된 오일 그루브(미도시)를 통과하면서 제2베어링(6B)과 회전축(4)사이의 마찰을 감소시킨다.At this time, the oil filled in the casing (1) is sucked up to the upper end by the oil feeder (not shown) and the oil flow path (4a) of the rotating shaft (4) and scattered while lubricating each sliding part and at the same time the electric mechanism part While cooling down, the oil flows down to the bottom of the casing 1, and the oil flowing down passes through the oil groove (not shown) formed in the inner circumference of the second bearing 6B and the second bearing 6B and the rotating shaft ( 4) Reduce the friction between.

그런데, 상기와 같은 종래의 밀폐형 회전식 압축기에 있어서는, 다음과 같은 문제점이 제기되어 왔다.However, the following problems have been raised in the conventional hermetic rotary compressor as described above.

즉, 회전축(4)의 하단부는 제1베어링(6A) 및 제2베어링(6B)에 의해 안정적으로 지지되는 구조를 취하고 있으나, 그 상단부는 단지 회전자(3)에 압입되어 있을 뿐이므로, 전체적으로 회전축(4)은 불평형한 구조를 취하고 있는 것이다.That is, the lower end portion of the rotating shaft 4 has a structure that is stably supported by the first bearing 6A and the second bearing 6B, but the upper end portion thereof is merely pressed into the rotor 3, so as a whole The rotating shaft 4 has an unbalanced structure.

따라서, 회전축(4)에 최대의 모멘트가 발생하는 회전자(3)의 초기구동시, 회전축(4)의 구조적 불평형에 의해 비틀림 모멘트가 발생하게 되는바, 이는 회전축(4)의 열화를 촉진시키는 요인이 된다.Accordingly, during initial driving of the rotor 3, which generates the greatest moment in the rotational shaft 4, a torsional moment occurs due to structural unbalance of the rotational shaft 4, which promotes deterioration of the rotational shaft 4. It becomes a factor.

또한, 회전축(3)에 상기와 같은 요인에 따른 휨이 발생할 경우, 고정자(2)와 회전자(3) 사이의 간극이 좁아져, 회전자(3)의 회전구동시 소음이 발생하게 되는 바, 문제점으로 지적되어 왔다.In addition, when the bending due to the above factors occurs in the rotary shaft 3, the gap between the stator 2 and the rotor 3 is narrowed, the noise generated when the rotor 3 rotates the bar It has been pointed out as a problem.

본 발명은 상기와 같은 문제점을 해결하여, 회전축의 구조적 불평형에 의한 비틀림 및 소음의 발생을 방지할 수 있는, 보다 진일보한 구조의 밀폐형 회전식 압축기를 제공함을 그 목적으로 한다.The present invention solves the above problems, and an object of the present invention is to provide a hermetic rotary compressor of a more advanced structure, which can prevent the generation of distortion and noise due to the structural unbalance of the rotating shaft.

도 1 및 도 2는 종래의 밀폐형 회전식 압축기의 구조를 도시한 것으로서,1 and 2 show the structure of a conventional hermetic rotary compressor,

도 1은 전체의 구조를 도시한 단면도1 is a cross-sectional view showing the overall structure

도 2는 회전축의 구조를 도시한 측면도Figure 2 is a side view showing the structure of the rotating shaft

도 3 및 도 4는 본 발명에 의한 밀폐형 회전식 압축기의 구조를 도시한 것으로서,3 and 4 illustrate the structure of the hermetic rotary compressor according to the present invention.

도 3은 전체의 구조를 도시한 단면도3 is a cross-sectional view showing the whole structure

도 4는 회전축 지지수단의 구조를 도시한 단면도4 is a cross-sectional view showing the structure of the shaft support means;

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

3 : 회전자4 : 회전축3: rotor 4: rotation axis

100 : 지지수단110 : 지지부100: support means 110: support portion

120 : 고정부120: fixed part

본 발명은 상술한 바와 같은 목적을 달성하기 위하여, 내부에 수용공간이 형성된 케이싱과, 상기 케이싱의 내부에 설치된 고정자 및 회전자에 의해 구성되는 전동기구부와, 상기 회전자의 중심에 압입된 회전축과, 상기 케이싱의 내주면에 고정된 원형의 실린더와, 상기 실린더의 양측면에 밀착되는 동시에 상기 회전축이 관통하여 그 회전축의 하단부를 회전가능하게 지지하는 제1베어링 및 제2베어링과, 상기 회전축에 접동되어 자전하면서 실린더내에서 편심 회전하는 롤링피스톤과, 상기 롤링피스톤의 외주면에 압접되어 그 롤링피스톤의 선회운동시 직선운동을 하면서 실린더를 흡입공간과 압축공간으로 구분하는 베인을 포함하는 밀폐형 회전식 압축기에 있어서, 상기 회전축의 회전자측으로 돌출된 상단부를 회전가능하게 지지하는 지지부와; 그 지지부를 상기 케이싱의 내면에 고정하는 고정부를; 포함하는 지지수단을 추가적으로 구비한 것을 특징으로 하는 밀폐형 회전식 압축기를 제시한다.The present invention, in order to achieve the object as described above, the casing having a receiving space therein, the electric drive unit consisting of a stator and a rotor provided inside the casing, a rotary shaft pressed into the center of the rotor and A circular cylinder fixed to an inner circumferential surface of the casing, a first bearing and a second bearing which are in close contact with both sides of the cylinder and at the same time rotatably support the lower end of the rotating shaft through the rotating shaft; In a closed rotary compressor comprising a rolling piston that rotates eccentrically in a cylinder while rotating, and a vane which is pressed against the outer circumferential surface of the rolling piston and divides the cylinder into a suction space and a compression space while performing linear movement during the pivoting movement of the rolling piston. A support part rotatably supporting the upper end part protruding to the rotor side of the rotation shaft; A fixing part for fixing the support part to the inner surface of the casing; The present invention provides a hermetic rotary compressor, further comprising a supporting means.

또한, 상기 고정부는 상기 지지부로부터 상기 케이싱의 내면을 향해 방사구조로서 연장된 복수개의 고정대인 것이 바람직하다.In addition, the fixing portion is preferably a plurality of fixing rods extending radially from the support portion toward the inner surface of the casing.

이하, 첨부도면을 참조하여 본 발명의 실시례에 관하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3 및 도 4는 본 발명에 의한 밀폐형 회전식 압축기의 구조를 도시한 것으로서, 도 3은 전체의 구조를 도시한 단면도, 도 4는 회전축 지지수단의 구조를 도시한 단면도이다.3 and 4 show the structure of the hermetic rotary compressor according to the present invention. FIG. 3 is a sectional view showing the whole structure, and FIG. 4 is a sectional view showing the structure of the rotating shaft support means.

도시된 바와 같이, 본 발명에 의한 밀폐형 회전식 압축기는 기본적으로, 내부에 수용공간이 형성된 케이싱(1)과, 케이싱(1)의 내부에 설치된 고정자(2) 및 회전자(3)에 의해 구성되는 전동기구부와, 회전자(3)의 중심에 압입된 회전축(4)과, 케이싱(1)의 내주면에 고정된 원형의 실린더(5)와, 실린더(5)의 양측면에 밀착되는 동시에 회전축(4)이 관통하여 그 회전축(4)의 하단부를 회전가능하게 지지하는 제1베어링(6A) 및 제2베어링(6B)과, 회전축(4)에 접동되어 자전하면서 실린더내에서 편심 회전하는 롤링피스톤(7)과, 롤링피스톤(7)의 외주면에 압접되어 그 롤링피스톤(7)의 선회운동시 직선운동을 하면서 실린더를 흡입공간과 압축공간으로 구분하는 베인(미도시)을 포함하여 구성된다.As shown, the hermetic rotary compressor according to the present invention is basically constituted by a casing 1 having an accommodating space therein, a stator 2 and a rotor 3 installed inside the casing 1. It is in close contact with both the electric mechanism part, the rotary shaft 4 press-fitted to the center of the rotor 3, the circular cylinder 5 fixed to the inner peripheral surface of the casing 1, and both sides of the cylinder 5, and the rotary shaft 4 ), The first bearing 6A and the second bearing 6B rotatably supporting the lower end of the rotating shaft 4, and the rolling piston which rotates eccentrically in the cylinder while rotating by rotating on the rotating shaft 4 7) and a vane (not shown) which is pressed against the outer circumferential surface of the rolling piston 7 and divides the cylinder into a suction space and a compression space while performing a linear movement during the pivoting movement of the rolling piston 7.

특히, 본 발명에 의한 밀폐형 회전식 압축기는 회전축(4)의 회전자(3)측으로 돌출된 상단부를 회전가능하게 지지하는 지지부(110)와; 그 지지부(110)를 케이싱(1)의 내면에 고정하는 고정부(120)를; 포함하는 지지수단(100)을 추가적으로 구비한다.In particular, the hermetic rotary compressor according to the present invention includes: a support 110 for rotatably supporting an upper end protruding toward the rotor 3 side of the rotating shaft 4; A fixing part 120 for fixing the support part 110 to the inner surface of the casing 1; It further comprises a supporting means 100 comprising.

즉, 본 발명에 있어서는, 회전축(4)의 하단부는 제1베어링(6A) 및 제2베어링(6B)에 의해 지지되고, 회전축(4)의 상단부는 지지수단(100)에 의해 지지되는 평형한 구조를 취하고 있으므로, 회전자(3)의 초기구동시 회전축(4)에 최대 모멘트가 발생하더라도 비틀림 모멘트가 발생하는 것을 방지할 수 있도록 하며, 결과적으로 회전자(3)와 고정자(2)의 접촉에 의한 소음을 감소시키는 효과를 볼 수 있도록 하는 것이다.That is, in the present invention, the lower end of the rotating shaft 4 is supported by the first bearing 6A and the second bearing 6B, and the upper end of the rotating shaft 4 is supported by the support means 100. Since the structure of the present invention allows the torsional moment to be prevented from occurring even when the maximum moment is generated in the rotating shaft 4 during the initial driving of the rotor 3, the contact between the rotor 3 and the stator 2 is consequently prevented. The effect is to reduce the noise caused by.

본 발명에 의한 지지수단(100)의 지지부(110)에 의해 회전축(4)의 휨이 방지되기 위해서는 지지부(110)의 내경과 회전축(4)의 외경 사이의 공간공차가 서로 일정한 값이 되도록 하여야 한다.In order to prevent the bending of the rotation shaft 4 by the support 110 of the support means 100 according to the present invention, the space tolerance between the inner diameter of the support 110 and the outer diameter of the rotation shaft 4 should be a constant value. do.

다음 도표는 금속재질에 의해 지지부(110)와 회전축(4)을 형성할 경우, 그 지지부(110)의 내경과 그 회전축(4)의 외경 사이의 최적공차를 나타낸 것이다.The following table shows the optimum tolerance between the inner diameter of the support 110 and the outer diameter of the rotary shaft 4 when the support 110 and the rotary shaft 4 are formed of a metal material.

회전축의 외경(mm)Outer diameter of rotating shaft (mm) 지지부의 내경(mm)Internal diameter of the support (mm) 공간공차(㎛)Space Tolerance (㎛) 14 ~ 1514-15 14 ~ 1514-15 16 ~ 2416 to 24 16 ~ 1816-18 16 ~ 1816-18 16 ~ 2416 to 24 19 ~ 2019-20 19 ~ 2019-20 21 ~ 3121 to 31 20 ~ 2320 to 23 20 ~ 2320 to 23 24 ~ 3424 to 34

본 발명에 의한 지지수단(100)의 고정부(120)는 지지부(110)를 케이싱(1)의 내면에 고정할 수 있는 것이면, 어떠한 구조를 취하여도 관계없을 것이나, 사이즈의 소형화를 꾀하는 밀폐형 회전식 압축기의 내부에는 여분의 공간이 협소하므로, 그 고정부(120)는 지지부(110)로부터 케이싱(1)의 내면을 향해 방사구조로서 연장된 복수개의 고정대(121)에 의해 형성되는 구조를 취하는 것이 바람직하다,The fixing part 120 of the supporting means 100 according to the present invention may have any structure as long as it can fix the supporting part 110 to the inner surface of the casing 1, but it is a hermetic rotary type for miniaturizing the size. Since the extra space is narrow inside the compressor, the fixing portion 120 has a structure formed by a plurality of fixing rods 121 extending radially from the supporting portion 110 toward the inner surface of the casing 1. desirable,

도면중 미설명 부호인 6a는 토출구멍, 8은 토출밸브 조립체, 9는 토출머플러, A는 어큐뮬레이터이다.In the figure, reference numeral 6a denotes a discharge hole, 8 denotes a discharge valve assembly, 9 denotes a discharge muffler, and A denotes an accumulator.

상기와 같이 구성된 종래의 밀폐형 회전식 압축기의 동작은 다음과 같다.The operation of the conventional hermetic rotary compressor configured as described above is as follows.

고정자(2)에 전원이 인가되면 그 전원의 인가에 따라 회전자(3)가 고정자(2)의 내부에서 회전을 하게 되고, 이와 함께 회전축(4)이 제1베어링(6A), 제2베어링 (6B)및 지지수단(100)에 의해 지지됨과 동시에 회전을 하면서 롤링피스톤(7)이 실린더(5)내에서 편심 회전을 하게 되며, 그 롤링피스톤(7)의 편심회전에 따라 냉매가스가 실린더(5)의 흡입공간으로 흡입되었다가 일정압력까지 지속적으로 압축되고, 그 실린더(5)의 압축공간 압력이 임계압력을 지나 케이싱(1)내의 압력보다 고압이 되는 순간 상기 제1베어링(6A)에 장착된 토출밸브(9)가 열리면서 압축가스가 압축공간에서 케이싱(1)의 내부로 토출되며, 이 토출가스는 케이싱(1)과 고정자(2)사이의 틈새 또는 고정자(2)와 회전자(3) 사이의 틈새 등을 통해 상부로 이동하여 토출관(DP)을 거쳐 냉동사이클시스템으로 배출된다.When power is applied to the stator 2, the rotor 3 rotates inside the stator 2 according to the application of the power, and the rotating shaft 4 is connected to the first bearing 6A and the second bearing. The rolling piston 7 rotates eccentrically in the cylinder 5 while being rotated while being supported by 6B and the support means 100, and the refrigerant gas flows along the eccentric rotation of the rolling piston 7 in the cylinder. The first bearing 6A is sucked into the suction space of (5) and continuously compressed to a constant pressure, and the compression space pressure of the cylinder (5) passes the critical pressure and becomes higher than the pressure in the casing (1). The discharge valve 9 mounted in the opening is opened and the compressed gas is discharged into the casing 1 in the compression space, which is a gap between the casing 1 and the stator 2 or the stator 2 and the rotor. (3) Move upward through gaps, etc., and pass through the discharge pipe (DP) to the refrigeration cycle system. It is discharged.

이때, 상기 케이싱(1)의 내부에 채워져 있던 오일은 회전축(4)의 오일피더(미도시) 및 오일유로(4a)에 의해 상단까지 흡상되었다가 비산되면서 각 습동부를 윤활시키는 동시에 전동기구부를 냉각시키면서 다시 케이싱(1)의 바닥으로 흘러 내리게 되는 바, 이와 같이 흘러 내리는 오일은 제2베어링(6B)의 내주부에 형성된 오일 그루브(미도시)를 통과하면서 제2베어링(6B)과 회전축(4)사이의 마찰을 감소시킨다.At this time, the oil filled in the casing (1) is sucked up to the upper end by the oil feeder (not shown) and the oil flow path (4a) of the rotating shaft (4) and scattered while lubricating the sliding parts and the electric mechanism unit While cooling down, the oil flows down to the bottom of the casing 1, and the oil flowing down passes through the oil groove (not shown) formed in the inner circumference of the second bearing 6B and the second bearing 6B and the rotating shaft ( 4) Reduce the friction between.

본 발명은 회전축의 구조적 불평형에 의한 비틀림 및 소음의 발생을 방지할 수 있는, 보다 진일보한 구조의 밀폐형 회전식 압축기를 제공한다.The present invention provides a hermetic rotary compressor having a more advanced structure, which can prevent the generation of torsion and noise due to structural unbalance of the rotating shaft.

Claims (2)

내부에 수용공간이 형성된 케이싱과, 상기 케이싱의 내부에 설치된 고정자 및 회전자에 의해 구성되는 전동기구부와, 상기 회전자의 중심에 압입된 회전축과, 상기 케이싱의 내주면에 고정된 원형의 실린더와, 상기 실린더의 양측면에 밀착되는 동시에 상기 회전축이 관통하여 그 회전축의 하단부를 회전가능하게 지지하는 제1베어링 및 제2베어링과, 상기 회전축에 접동되어 자전하면서 실린더내에서 편심 회전하는 롤링피스톤과, 상기 롤링피스톤의 외주면에 압접되어 그 롤링피스톤의 선회운동시 직선운동을 하면서 실린더를 흡입공간과 압축공간으로 구분하는 베인을 포함하는 밀폐형 회전식 압축기에 있어서,A casing having an accommodating space therein, an electric mechanism part constituted by a stator and a rotor installed inside the casing, a rotating shaft press-fitted into the center of the rotor, and a circular cylinder fixed to an inner circumferential surface of the casing; A first bearing and a second bearing in close contact with both sides of the cylinder and rotatably supporting the lower end of the rotating shaft, and a rolling piston eccentrically rotating in the cylinder while being rotated by the rotating shaft; In the hermetic rotary compressor including a vane which is pressed against the outer circumferential surface of the rolling piston and divides the cylinder into a suction space and a compression space while performing linear movement during the pivoting movement of the rolling piston. 상기 회전축의 회전자측으로 돌출된 상단부를 회전가능하게 지지하는 지지부와;A support portion rotatably supporting the upper end portion protruding to the rotor side of the rotation shaft; 그 지지부를 상기 케이싱의 내면에 고정하는 고정부를; 포함하는 지지수단을 추가적으로 구비한 것을 특징으로 하는 밀폐형 회전식 압축기.A fixing part for fixing the support part to the inner surface of the casing; Sealed rotary compressor, characterized in that it further comprises a supporting means comprising. 제1항에 있어서,The method of claim 1, 상기 고정부는 상기 지지부로부터 상기 케이싱의 내면을 향해 방사구조로서 연장된 복수개의 고정대인 것을 특징으로 하는 밀폐형 회전식 압축기.And said fixing part is a plurality of fixing parts extending radially from said support part toward the inner surface of said casing.
KR10-2002-0021989A 2002-04-22 2002-04-22 Crankshift support device for rotary comrressor KR100459450B1 (en)

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JPH0213188A (en) * 1988-06-30 1990-01-17 Matsushita Electric Ind Co Ltd Video signal processor
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JPH03194186A (en) * 1989-12-20 1991-08-23 Fujitsu General Ltd Rotary compressor
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