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KR100631550B1 - Back pressure sealing apparatus for high-pressure type scroll compressor - Google Patents

Back pressure sealing apparatus for high-pressure type scroll compressor Download PDF

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Publication number
KR100631550B1
KR100631550B1 KR1020040104421A KR20040104421A KR100631550B1 KR 100631550 B1 KR100631550 B1 KR 100631550B1 KR 1020040104421 A KR1020040104421 A KR 1020040104421A KR 20040104421 A KR20040104421 A KR 20040104421A KR 100631550 B1 KR100631550 B1 KR 100631550B1
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South Korea
Prior art keywords
pressure
scroll
back pressure
sealing member
scroll compressor
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KR1020040104421A
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Korean (ko)
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KR20060065320A (en
Inventor
김철환
조양희
신동구
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엘지전자 주식회사
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Priority to KR1020040104421A priority Critical patent/KR100631550B1/en
Publication of KR20060065320A publication Critical patent/KR20060065320A/en
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Publication of KR100631550B1 publication Critical patent/KR100631550B1/en

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    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/005—Axial sealings for working fluid
    • 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
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • 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
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • F04C18/0292—Ports or channels located in the wrap
    • 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
    • F04C29/028—Means for improving or restricting lubricant flow
    • 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
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • 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
    • F04C2240/40—Electric motor
    • 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
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

본 발명은 고압식 스크롤 압축기의 배압 실링 장치에 관한 것으로, 케이싱의 내부공간으로 토출되는 고압의 냉매가스가 선회스크롤과 이에 대응하는 프레임 사이로 누설되어 압축실로 유입되는 것을 차단하도록 기동시 압력차에 의해 부상하면서 상기 선회스크롤과 프레임 사이를 차단하는 실링부재를 설치하여서 된 고압식 스크롤 압축기에 있어서, 실링부재의 저면으로 케이싱의 오일 일부가 공급되도록 상기 프레임에 배압구멍을 형성함으로써, 기동시에 실링부재가 신속하게 부상하여 메인프레임과 선회스크롤 사이를 차단함에 따라 고압의 냉매가스가 압축실로 유입되는 것을 효과적으로 방지하여 압축기의 신뢰성을 높일 수 있다.The present invention relates to a back pressure sealing device of a high-pressure scroll compressor, the pressure of the high-pressure refrigerant discharged into the inner space of the casing by the pressure difference at the start to prevent the leakage between the swing scroll and the corresponding frame flow into the compression chamber In the high-pressure scroll compressor provided with a sealing member which intercepts the swing scroll and the frame while floating, a back pressure hole is formed in the frame so that a part of the casing oil is supplied to the bottom surface of the sealing member. By rapidly rising and blocking between the mainframe and the turning scroll, it is possible to effectively prevent the high-pressure refrigerant gas from flowing into the compression chamber to increase the reliability of the compressor.

Description

고압식 스크롤 압축기의 배압 실링 장치{BACK PRESSURE SEALING APPARATUS FOR HIGH-PRESSURE TYPE SCROLL COMPRESSOR}BACK PRESSURE SEALING APPARATUS FOR HIGH-PRESSURE TYPE SCROLL COMPRESSOR}

도 1은 종래 고압식 스크롤 압축기의 일례를 보인 단면도,1 is a cross-sectional view showing an example of a conventional high pressure scroll compressor;

도 2a 및 도 2b는 도 1의 "A"부를 보인 상세도로서, 종래 고압식 스크롤 압축기에서 실링부재의 동작을 보인 개략도,2a and 2b is a detailed view showing part "A" of Figure 1, a schematic view showing the operation of the sealing member in the conventional high pressure scroll compressor,

도 3은 본 발명 고압식 스크롤 압축기의 일례를 보인 단면도,3 is a cross-sectional view showing an example of the high-pressure scroll compressor of the present invention;

도 4a 및 도 4b는 본 발명 고압식 스크롤 압축기에서 실링부재의 동작을 보인 개략도.Figures 4a and 4b is a schematic view showing the operation of the sealing member in the high pressure scroll compressor of the present invention.

** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **

6 : 선회스크롤 8 : 실링부재6: turning scroll 8: sealing member

10 : 메인프레임 11 : 축구멍10 main frame 11 shaft hole

12 : 보스수용홈 13 : 배압공간홈12: boss accommodation groove 13: back pressure space groove

14 : 가스연통홈 15 : 급유구멍14: gas communication groove 15: oil supply hole

16 : 실링홈 17 : 배압구멍16: sealing groove 17: back pressure hole

본 발명은 고압식 스크롤 압축기의 배압 실링 장치에 관한 것으로, 특히 실링부재를 용이하게 상승시켜 선회스크롤의 배면을 효과적으로 실링할 수 있도록 하는 고압식 스크롤 압축기의 배압 장치에 관한 것이다.The present invention relates to a back pressure sealing device of a high pressure scroll compressor, and more particularly, to a back pressure device of a high pressure scroll compressor to easily raise the sealing member to effectively seal the back of the swing scroll.

일반적으로 스크롤식 압축기는 공조기 분야에 널리 적용하는 고효율 저소음 압축기로서, 두 개의 스크롤이 상대 선회운동을 하면서 스크롤 사이에 복수 개의 압축실을 쌍으로 형성하고, 이 압축실이 지속적으로 중심방향으로 이동하면서 체적이 작아져 냉매가스를 연속으로 흡입 압축하여 토출하는 방식이다.In general, a scroll compressor is a high-efficiency low noise compressor widely applied to an air conditioner. A plurality of compression chambers are formed in pairs between scrolls while the two scrolls rotate relative to each other, and the compression chamber continuously moves toward the center. The volume decreases and the refrigerant gas is continuously sucked and compressed to be discharged.

스크롤 압축기는 케이싱의 내부에 흡입가스가 채워지느냐 토출가스가 채워지느냐에 따라 크게 저압식과 고압식으로 구분할 수 있다. 고압식 스크롤 압축기는 도 1에 도시한 바와 같이 고압상태를 유지하고 가스흡입관(SP)과 가스토출관(DP)을 구비하는 케이싱(1)과, 케이싱(1) 내부의 상하 양측에 각각 고정하는 메인프레임(2) 및 서브프레임(미도시)과, 메인프레임(2)과 서브프레임(미도시) 사이에 장착하여 회전력을 발생하는 구동모터(미도시)와, 구동모터(미도시)의 회전자 중심에 압입하고 메인프레임(2)을 관통하여 구동모터의 회전력을 전달하는 구동축(4)과, 메인프레임(2)의 상면에 고정 설치하고 상기한 가스흡입관(SP)을 직접 결합하는 고정스크롤(5)과, 고정스크롤(5)에 맞물려 두 개 한 쌍의 압축실(P)을 형성하도록 메인프레임(2)의 상면에 선회 가능하게 얹히는 선회스크롤(6)과, 선회스크롤(6)과 메인프레임(2) 사이에 설치하여 상기 선회스크롤(5)의 자전을 방지하면서 선회시키는 올담링(Oldham's ring)(7)과, 선회스크롤(5)과 메인프레임(2) 사이에 개재하여 토출가스의 누설을 차단하는 실링부재(8)를 포함하고 있다.The scroll compressor can be classified into low pressure type and high pressure type according to whether the suction gas or the discharge gas is filled in the casing. As shown in FIG. 1, the high-pressure scroll compressor maintains a high pressure state and fixes the casing 1 having a gas suction pipe SP and a gas discharge pipe DP and fixed to upper and lower sides of the casing 1, respectively. The main motor 2 and the subframe (not shown), the drive motor (not shown) mounted between the main frame 2 and the subframe (not shown) to generate a rotational force, and the drive motor (not shown) Fixed scroll for directly coupling the gas suction pipe (SP) and fixedly installed on the upper surface of the main shaft (2) and the drive shaft (4) to press the electron center and penetrate the main frame (2) to transmit the rotational force of the drive motor (5), the swinging scroll (6) pivotally mounted on the upper surface of the main frame (2) so as to form two pairs of compression chambers (P) in engagement with the fixed scroll (5), and the turning scroll (6). Installed between the main frame and the main frame 2 for turning while preventing the rotating scroll 5 from rotating. And a ring (Oldham's ring), (7) and, an orbiting scroll 5 and the main frame (2) the sealing member 8 to block the leakage of discharge gas interposed therebetween.

가스흡입관(SP)은 케이싱(1)을 통과하여 고정스크롤(5)의 흡입구(5b)에 연통 설치하는 한편 가스토출관(DP)은 메인프레임(2)을 중심으로 고정스크롤(5)의 반대쪽 케이싱(1)의 내부공간에 밀봉하도록 연통 설치하고 있다.The gas suction pipe SP passes through the casing 1 and communicates with the suction port 5b of the fixed scroll 5 while the gas discharge pipe DP is opposite to the fixed scroll 5 around the main frame 2. Communication is provided so as to seal in the inner space of the casing (1).

메인프레임(2)은 그 중앙에 구동축(4)을 반경방향으로 지지하는 축구멍(2a)을 형성하고, 축구멍(2a)의 상반부에는 선회스크롤(6)의 보스부(6b)가 선회운동을 하도록 보스수용홈(2b)을 확장 형성하며, 상면 가장자리에는 상기 선회스크롤(6)의 배면과 함께 소정의 내부체적을 가지고 그 내부체적에 중간압측 압력의 냉매가스가 채워지도록 환형의 배압공간홈(2c)을 음형지게 형성하고, 메인프레임(2)의 외주면에는 고정스크롤(5)을 통해 토출되는 토출가스가 상기한 가스토출관(DP)으로 유도될 수 있도록 적당개소에 가스연통홈(2d)을 형성하고 있다. 또, 보스수용홈(2b)에서 배압공간홈(2c)으로는 상기 보스수용홈(2b)에 채워지는 오일의 일부를 배압공간홈(2c)을 통해 압축실(P)로 공급하도록 하는 급유구멍(2e)을 형성하고, 메인프레임(2)의 스러스트베어링면 중간, 즉 배압공간홈(2c)과 축구멍(2a)의 사이에는 고압의 토출가스가 배압공간홈(2c)으로 유입되는 것을 차단하기 위한 실링부재(8)를 삽입하는 실링홈(2f)을 형성하고 있다. 여기서, 급유구멍(2e)에는 고압의 오일을 감압하여 배압공간홈(2c)으로 안내하도록 감압부재(9)를 설치하고 있다.The main frame 2 has a shaft hole 2a for radially supporting the drive shaft 4 at the center thereof, and the boss portion 6b of the swing scroll 6 is pivoted at the upper half of the shaft hole 2a. The boss accommodating groove (2b) is formed to extend, and the upper surface edge has a predetermined internal volume with the back surface of the swing scroll (6) and the annular back pressure space groove so that the refrigerant gas of the intermediate pressure side pressure is filled in the inner volume thereof. (2c) is formed negatively, and the gas communication groove (2d) in the appropriate place so that the discharge gas discharged through the fixed scroll (5) can be guided to the gas discharge pipe (DP) on the outer peripheral surface of the main frame (2) ). In addition, the oil supply hole for supplying a portion of the oil filled in the boss accommodation groove (2b) from the boss accommodation groove (2b) to the compression chamber (P) through the back pressure space groove (2c). (2e) and block the high-pressure discharge gas from flowing into the back pressure space groove (2c) in the middle of the thrust bearing surface of the main frame (2), that is, between the back pressure space groove (2c) and the shaft hole (2a). A sealing groove 2f into which the sealing member 8 is inserted is formed. Here, the pressure reducing member 9 is provided in the oil supply hole 2e so as to reduce the pressure of the high pressure oil and guide it to the back pressure space groove 2c.

도면중 미설명 부호인 5a는 고정스크롤의 랩, 5c는 토출구, 5d는 가스통과홈, 6a는 선회스크롤의 랩이다.In the figure, 5a is a wrap of the fixed scroll, 5c is a discharge port, 5d is a gas passage groove, and 6a is a wrap of the turning scroll.

상기와 같은 종래의 고압식 스크롤 압축기는 다음과 같이 동작한다.The conventional high pressure scroll compressor as described above operates as follows.

즉, 구동모터에 전원을 인가하면, 구동축(4)이 구동모터의 회전자와 함께 회 전을 하면서 선회스크롤(5)이 올담링(7)에 의해 메인프레임(2)의 상면에서 편심 거리만큼 선회운동을 하고, 이와 함께 선회스크롤(6)은 고정스크롤(5)과의 랩(5a,6a) 사이에서 연속으로 이동하는 두 개 한 쌍의 압축실(P)을 형성하며, 이 압축실(P)은 선회스크롤(6)의 지속적인 선회운동에 의해 중심으로 이동하면서 체적이 감소하여 냉매가스를 흡입 압축하여 케이싱(1)의 내부공간으로 토출하고, 이 냉매가스는 고정스크롤(5)의 가스통과홈과 메인프레임(2)의 가스연통홈(2d)을 통과하여 케이싱(1)의 하측 내부공간으로 이동하면서 가스토출관(DP)을 통해 시스템으로 토출된다.That is, when power is supplied to the drive motor, the turning scroll 5 rotates with the eccentric distance from the upper surface of the main frame 2 by the old dam ring 7 while the drive shaft 4 rotates with the rotor of the drive motor. The swinging movement, together with the swinging scroll 6, forms a pair of two compression chambers P which are continuously moved between the laps 5a and 6a with the fixed scroll 5, and this compression chamber ( P) is moved to the center by the continuous swinging motion of the turning scroll 6, the volume decreases, and the refrigerant gas is sucked and compressed and discharged into the inner space of the casing 1, and this refrigerant gas is a gas cylinder of the fixed scroll 5 Passed through the gas communication groove (2d) of the over-groove and the main frame (2d) is discharged to the system through the gas discharge pipe (DP) while moving to the lower inner space of the casing (1).

이때, 케이싱(1)의 하측 내부공간으로 이동하는 냉매가스는 고압 상태를 유지함에 따라 메인프레임(2)의 축구멍(2a)과 구동축(4) 사이를 통해 보스수용홈(2b)으로 유입되었다가 선회스크롤(6)의 배면과 메인프레임(2)의 상면 사이를 통해 중간압 상태인 배압공간홈(2c)으로 유입되려고 하나, 도 2a에서와 같이 기동시 메인프레임(2)의 실링홈(2f)에 가라앉아 있던 실링부재(8)가 상기한 고압의 냉매가스에 밀려 점차 부상하면서 정상운전시 도 2b에서와 같이 완전히 부상하여 보스수용홈(2b)과 배압공간홈(2c)을 차단함으로써 냉매가스가 상기 배압공간홈(2c)으로 누설되는 것을 차단하는 것이었다.At this time, the refrigerant gas moving to the lower inner space of the casing (1) flowed into the boss receiving groove (2b) between the shaft hole (2a) and the drive shaft (4) of the main frame (2) as it maintains a high pressure state. Is intended to flow into the back pressure space groove (2c) of the intermediate pressure state between the rear surface of the turning scroll (6) and the upper surface of the main frame (2), the sealing groove of the main frame (2) at the start (Fig. The sealing member 8, which had sunk in 2f), was gradually pushed up by the above-mentioned high-pressure refrigerant gas and completely floated as shown in FIG. 2B during normal operation, thereby blocking the boss accommodation groove 2b and the back pressure space groove 2c. The refrigerant gas was prevented from leaking into the back pressure space groove 2c.

그러나, 상기와 같은 종래 고압식 스크롤 압축기에 있어서는, 기동시 토출압력이 낮은 상태에서는 실링부재(8)가 신속하게 부상하지 못하여 고압의 냉매가스가 배압공간홈(2c)으로 누설된 상태로 운전을 진행하게 되어 선회스크롤(6)의 배면 전체에 토출압력이 걸리면서 랩(5a,6a)의 선단이 과도하게 압착되어 마찰손실일 발생할 우려가 있을 뿐만 아니라 배압공간홈(2c)으로 고압의 토출가스가 유입되어 최외 곽측 압축실 압력 보다 현저하게 높아지면서 토출가스의 일부가 압축실로 유입되면서 흡입손실을 야기할 우려가 있었다.However, in the conventional high pressure scroll compressor as described above, when the discharge pressure is low at the start-up, the sealing member 8 is not rapidly floated and the high pressure refrigerant gas leaks into the back pressure space groove 2c. As the discharge pressure is applied to the entire rear surface of the turning scroll 6, the tip ends of the wraps 5a and 6a are excessively compressed, which may cause frictional loss, as well as high pressure discharge gas into the back pressure space groove 2c. There was a risk of inhalation loss as a portion of the discharge gas flows into the compression chamber as it is significantly higher than the outermost compression chamber pressure.

이를 감안하여 도면으로 제시하지는 않았으나 상기 실링부재의 하측에 판스프링을 설치하는 경우도 있으나, 이는 별도의 스프링을 부가하는데 따라 생산비용이 증가하게 될 뿐만 아니라 상기한 실링부재가 판스프링에 의해 항상 선회스크롤의 배면과 압착하고 있어 기동시 부하가 증가되면서 압축기 성능이 저하되는 문제점이 있었다.Although not shown in the drawings in consideration of this, there is a case in which the leaf spring is installed on the lower side of the sealing member, but this increases the production cost by adding a separate spring, and the sealing member is always turned by the leaf spring. Compression with the back of the scroll has a problem that the compressor performance is reduced as the load is increased during startup.

본 발명은 상기와 같은 종래 고압식 스크롤 압축기가 가지는 문제점을 감안하여 안출한 것으로, 메인프레임과 선회스크롤 사이를 실링하는 실링부재를 신속하게 부상시켜 냉매가스가 압축실로 유입되는 것을 방지할 수 있는 고압식 스크롤 압축기의 배압 실링 장치를 제공하려는데 본 발명의 목적이 있다. The present invention has been made in view of the problems of the conventional high-pressure scroll compressor as described above, by rapidly rising the sealing member sealing between the main frame and the swing scroll to prevent the high-pressure refrigerant gas flow into the compression chamber SUMMARY OF THE INVENTION An object of the present invention is to provide a back pressure sealing device for a type scroll compressor.

본 발명의 목적을 달성하기 위하여, 케이싱의 내부공간으로 토출되는 고압의 냉매가스가 선회스크롤과 이에 대응하는 프레임 사이로 누설되어 압축실로 유입되는 것을 차단하도록 기동시 압력차에 의해 부상하면서 상기 선회스크롤과 프레임 사이를 차단하는 실링부재를 설치하여서 된 고압식 스크롤 압축기에 있어서, 실링부재의 저면으로 케이싱의 오일 일부가 공급되도록 상기 프레임에 배압구멍을 형성하는 것을 특징으로 하는 고압식 스크롤 압축기의 배압 실링 장치를 제공한다.In order to achieve the object of the present invention, the high-pressure refrigerant gas discharged into the inner space of the casing is leaked by the pressure difference during start-up to prevent the leakage between the swing scroll and the corresponding frame to enter the compression chamber and the swing scroll and In the high pressure scroll compressor provided with a sealing member for blocking between frames, a back pressure hole is formed in the frame so that a part of the casing oil is supplied to the bottom surface of the sealing member. To provide.

이하, 본 발명에 의한 고압식 스크롤 압축기의 배압 실링 장치를 첨부도면에 도시한 일실시예에 의거하여 상세하게 설명한다.Hereinafter, the back pressure sealing device of the high-pressure scroll compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

도 3은 본 발명 고압식 스크롤 압축기의 일례를 보인 단면도이고, 도 4a 및 도 4b는 본 발명 고압식 스크롤 압축기에서 실링부재의 동작을 보인 개략도이다.Figure 3 is a cross-sectional view showing an example of the high pressure scroll compressor of the present invention, Figures 4a and 4b is a schematic view showing the operation of the sealing member in the high pressure scroll compressor of the present invention.

도 1을 참조하면 본 발명 고압식 스크롤 압축기는, 고압상태를 유지하고 가스흡입관(SP)과 가스토출관(DP)을 구비하는 케이싱(1)과, 케이싱(1) 내부에 고정하는 메인프레임(10)과, 메인프레임(10)의 상면에 고정 설치하고 상기한 가스흡입관(SP)을 직접 결합하는 고정스크롤(5)과, 구동축(4)에 편심지게 결합하여 메인프레임(10)의 상면에서 얹히고 고정스크롤(5)에 맞물려 올담링(7)에 의해 선회하면서 복수 개의 압축실(P)을 형성하는 선회스크롤(6)과, 압축기의 기동시 또는 정상운전시 부상하여 선회스크롤(6)의 저면과 메인프레임(10)의 상면 사이를 차단하여 토출가스가 압축실(P)로 유입하는 것을 차단하는 실링부재(8)를 포함한다.Referring to Figure 1 of the present invention, the high-pressure scroll compressor, the casing (1) having a high pressure state and having a gas suction pipe (SP) and the gas discharge pipe (DP), and the main frame fixed in the casing (1) ( 10) and a fixed scroll (5) fixedly installed on the upper surface of the main frame (10) and directly coupled to the gas suction pipe (SP), and eccentrically coupled to the drive shaft (4) on the upper surface of the main frame (10). A swinging scroll 6 which is mounted and engaged with the fixed scroll 5 to form a plurality of compression chambers P while swinging by the old dam ring 7, and a swinging scroll 6 that floats during startup or normal operation of the compressor. It includes a sealing member 8 to block between the bottom surface and the upper surface of the main frame 10 to block the discharge gas into the compression chamber (P).

가스흡입관(SP)은 케이싱(1)을 통과하여 고정스크롤(5)의 흡입구(5b)에 연통 설치하는 한편 가스토출관(DP)은 메인프레임(10)을 중심으로 고정스크롤(5)의 반대쪽 케이싱(1)의 내부공간에 밀봉하도록 연통 설치한다.The gas suction pipe SP passes through the casing 1 and is installed in communication with the suction port 5b of the fixed scroll 5 while the gas discharge pipe DP is opposite to the fixed scroll 5 around the main frame 10. It is installed in communication so as to seal in the inner space of the casing (1).

메인프레임(10)은 그 중앙에 구동축(4)을 반경방향으로 지지하는 축구멍(11)을 형성하고, 축구멍(11)의 상반부에는 선회스크롤(6)의 보스부(6b)가 선회운동을 하도록 보스수용홈(12)을 확장 형성하며, 상면 가장자리에는 상기 선회스크롤(6)의 배면과 함께 소정의 내부체적을 가지고 그 내부체적에 중간압측 압력의 냉매가스가 채워지도록 환형의 배압공간홈(13)을 음형지게 형성하고, 메인프레임(10)의 외주면에는 고정스크롤(5)을 통해 토출되는 토출가스가 상기한 가스토출관(DP)으로 유도 될 수 있도록 적당개소에 가스연통홈(14)을 형성한다.The main frame 10 has a shaft hole 11 for radially supporting the drive shaft 4 at the center thereof, and the boss portion 6b of the swing scroll 6 is pivoted at the upper half of the shaft hole 11. The boss accommodation groove 12 is formed to be extended, and the upper surface edge has a predetermined inner volume together with the rear surface of the turning scroll 6, and the inner volume of the annular back pressure space groove is filled with the refrigerant gas of the intermediate pressure side pressure. (13) to be formed negatively, the gas communication groove 14 in the appropriate place so that the discharge gas discharged through the fixed scroll (5) can be guided to the gas discharge pipe (DP) on the outer peripheral surface of the main frame (10) ).

또, 보스수용홈(12)에서 배압공간홈(13)으로는 상기 보스수용홈(12)에 채워지는 오일의 일부를 배압공간홈(13)을 통해 압축실(P)로 공급하도록 하는 급유구멍(15)을 형성하고, 메인프레임(10)의 스러스트베어링면 중간, 즉 배압공간홈(13)과 축구멍(11)의 사이에는 상기한 실링부재(8)를 삽입하는 실링홈(16)을 형성한다. 여기서, 급유구멍(15)의 중간에는 배압공간홈(13)으로 공급되던 오일의 일부를 상기 실링홈(16)으로 안내하여 그 실링홈(16)에 가라앉아 있던 실링부재(8)가 기동시 또는 정상운전시 신속하고 안정되게 부상되도록 하는 배압구멍(17)을 형성한다.In addition, the oil supply hole for supplying a part of the oil filled in the boss accommodation groove 12 from the boss accommodation groove 12 to the compression chamber (P) through the back pressure space groove (13). And a sealing groove 16 for inserting the sealing member 8 in the middle of the thrust bearing surface of the main frame 10, that is, between the back pressure space groove 13 and the shaft hole 11. Form. Here, a part of the oil supplied to the back pressure space groove 13 is guided to the sealing groove 16 in the middle of the oil supply hole 15 so that the sealing member 8 that has sunk in the sealing groove 16 starts up. Or it forms a back pressure hole 17 to rise quickly and stably in normal operation.

도면중 종래와 동일한 부분에 대하여는 동일한 부호를 부여하였다.In the drawings, the same reference numerals are given to the same parts as in the prior art.

도면중 미설명 부호인 9는 감압부재이다.9, which is not described, is a pressure reducing member.

상기와 같은 본 발명 고압식 스크롤 압축기의 배압 실링 장치는 다음과 같은 작용 효과가 있다.The back pressure sealing device of the high pressure scroll compressor of the present invention as described above has the following effects.

즉, 인가한 전원에 의해 구동축(4)이 구동모터(미도시)의 회전자와 함께 회전을 하면서 선회스크롤(6)이 편심거리 만큼 선회하고, 이와 함께 선회스크롤(6)은 고정스크롤(5)과의 사이에 연속으로 이동하면서 체적이 좁아지는 두 개 한 쌍의 압축실(P)을 형성하여 냉매가스를 흡입 압축하여 케이싱(1)의 내부공간으로 토출한다.That is, while the drive shaft 4 rotates with the rotor of the drive motor (not shown) by the applied power, the turning scroll 6 turns by an eccentric distance, and the turning scroll 6 is fixed scroll (5). A pair of compression chambers (P) whose volume is narrowed while being continuously moved between them is formed, suction refrigerant is compressed and discharged into the inner space of the casing (1).

이때, 케이싱(1)의 내부공간으로 토출되는 냉매가스는 메인프레임(10)의 축구멍(11)과 구동축(4)의 사이로 유입되어 선회스크롤(5)의 배면과 이에 대응하는 메인프레임(10)의 상면 사이의 틈새를 통해 압축실(P)로 유입될 수 있으나, 메인프 레임(10)과 선회스크롤(5)의 사이에는 실링부재(8)가 개재되어 고압의 냉매가스가 압축실(P)로 유입되는 것을 차단한다. 즉, 압축기의 정지시에는 케이싱(1) 전체가 평압을 유지함에 따라 실링부재(8)가 자체 무게에 의해 실링홈(16)의 바닥에 가라앉아 있다가 압축기의 기동시에는 도 4a에서와 같이 토출압력으로 상승하는 케이싱(1) 내부의 냉매가스에 밀려 부상하여 선회스크롤(6)의 배면에 밀착하게 되는데, 이때 구동축(4)이 회전하면서 케이싱(1)의 바닥에서 펌핑하는 오일이 메인프레임(10)의 보스수용홈(12)에 고였다가 일부는 급유구멍(15)을 통해 배압공간홈(13)으로 감압 공급되는 반면 일부는 배압구멍(17)을 통해 실링홈(16)으로 공급되어 실링부재(8)를 밀어올림으로써 상기 실링부재(8)가 기동시에도 신속하게 부상하여 냉매가스의 누설을 보다 효과적으로 차단할 수 있다.At this time, the refrigerant gas discharged into the inner space of the casing (1) flows between the shaft hole (11) and the drive shaft (4) of the main frame (10) to the back of the turning scroll (5) and the corresponding main frame (10) It may be introduced into the compression chamber (P) through the gap between the upper surface of the), but the sealing member (8) is interposed between the main frame (10) and the swinging scroll (5) the high-pressure refrigerant gas ( Block entry to P). That is, as the entire casing 1 maintains a flat pressure when the compressor is stopped, the sealing member 8 sinks to the bottom of the sealing groove 16 by its own weight, and as shown in FIG. 4A when the compressor is started. The oil is pumped from the bottom of the casing 1 while the drive shaft 4 is rotated by being pushed by the refrigerant gas inside the casing 1 rising to the discharge pressure and floating on the back surface of the turning scroll 6. While accumulated in the boss accommodation groove (12) of the (10) part is supplied to the back pressure space groove 13 through the oil supply hole 15 to reduce the pressure while a part is supplied to the sealing groove (16) through the back pressure hole (17) By pushing up the sealing member 8, the sealing member 8 can rise quickly even at the time of starting, and can more effectively block the leakage of refrigerant gas.

또, 압축기가 정상운전을 할 때에도 도 4b에서와 같이 실링부재(8)가 선회스크롤(6)과 메인프레임(10) 사이로 유입되는 냉매가스의 압력과 배압구멍(17)을 통해 공급되는 오일의 압력에 밀려 안정적으로 부상상태를 유지하면서 선회스크롤(6)과 메인프레임(10) 사이를 차단함으로써 고압의 냉매가스가 배압공간홈(13)을 통해 압축실(P)로 유입되는 것을 효과적으로 차단할 수 있다. In addition, even when the compressor is in normal operation, as shown in FIG. 4B, the sealing member 8 is supplied with the pressure of the refrigerant gas flowing between the swinging scroll 6 and the main frame 10 and the oil supplied through the back pressure hole 17. It can effectively block the flow of high-pressure refrigerant gas into the compression chamber (P) through the back pressure space groove (13) by blocking between the turning scroll (6) and the main frame (10) while maintaining a stable floating state due to the pressure. have.

본 발명에 의한 고압식 스크롤 압축기의 배압 실링 장치는, 메인프레임에 실링홈을 형성하여 실링부재를 설치하고, 그 실링홈에 배압구멍을 연통하여 오일로 상기 실링부재를 부상시킴으로써, 기동시에 실링부재가 신속하게 부상하여 메인프레임과 선회스크롤 사이를 차단함에 따라 고압의 냉매가스가 압축실로 유입되는 것 을 효과적으로 방지하여 압축기의 신뢰성을 높일 수 있다.In the back pressure sealing apparatus of the high-pressure scroll compressor according to the present invention, a sealing member is formed in a main frame, a sealing member is provided, and the sealing member is floated with oil by communicating a back pressure hole in the sealing groove, thereby causing the sealing member to be started. As a result of the rapid rise and blocking between the mainframe and the turning scroll, it is possible to effectively prevent the high-pressure refrigerant gas from flowing into the compression chamber, thereby increasing the reliability of the compressor.

Claims (2)

케이싱의 내부공간으로 토출되는 고압의 냉매가스가 선회스크롤과 이에 대응하는 프레임 사이로 누설되어 압축실로 유입되는 것을 차단하도록 기동시 압력차에 의해 부상하면서 상기 선회스크롤과 프레임 사이를 차단하는 실링부재를 설치하여서 된 고압식 스크롤 압축기에 있어서,A sealing member is provided to block the space between the swing scroll and the frame while floating by the pressure difference during startup so as to prevent the high-pressure refrigerant gas discharged into the inner space of the casing from leaking between the swing scroll and the corresponding frame to flow into the compression chamber. In the high pressure scroll compressor, 실링부재의 저면으로 케이싱의 오일 일부가 공급되도록 상기 프레임에 배압구멍을 형성하는 것을 특징으로 하는 고압식 스크롤 압축기의 배압 실링 장치.Back pressure sealing device of the high-pressure scroll compressor, characterized in that to form a back pressure hole in the frame so that the oil portion of the casing is supplied to the bottom surface of the sealing member. 제1항에 있어서,The method of claim 1, 프레임에는 소정량의 오일을 상기 압축실로 안내하는 급유구멍을 형성하고, 그 급유구멍의 중간에서 상기 배압구멍을 연통 형성하는 것을 특징으로 하는 고압식 스크롤 압축기의 배압 실링 장치.An oil supply hole for guiding a predetermined amount of oil into the compression chamber is formed in the frame, and the back pressure hole is formed in communication with the oil supply hole.
KR1020040104421A 2004-12-10 2004-12-10 Back pressure sealing apparatus for high-pressure type scroll compressor KR100631550B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101425079B1 (en) 2011-10-17 2014-08-01 갑을오토텍(주) Lubricating apparatus of a scroll compressor
CN104373346A (en) * 2013-08-14 2015-02-25 丹佛斯（天津）有限公司 Scroll-compressor and medium pressure cavity sealing method and sealing device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101238203B1 (en) * 2006-06-20 2013-03-04 엘지전자 주식회사 Back pressure sealing apparatus for scroll compressor
CN105649992B (en) * 2016-01-18 2017-11-24 广东美的暖通设备有限公司 A kind of method and screw compressor for reducing screw compressor back-pressure surges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101425079B1 (en) 2011-10-17 2014-08-01 갑을오토텍(주) Lubricating apparatus of a scroll compressor
CN104373346A (en) * 2013-08-14 2015-02-25 丹佛斯（天津）有限公司 Scroll-compressor and medium pressure cavity sealing method and sealing device

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