KR20080054844A - Thrust bearing device for scroll compressor - Google Patents

Thrust bearing device for scroll compressor Download PDF

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Publication number
KR20080054844A
KR20080054844A KR1020060127449A KR20060127449A KR20080054844A KR 20080054844 A KR20080054844 A KR 20080054844A KR 1020060127449 A KR1020060127449 A KR 1020060127449A KR 20060127449 A KR20060127449 A KR 20060127449A KR 20080054844 A KR20080054844 A KR 20080054844A
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KR
South Korea
Prior art keywords
bearing
axial
drive shaft
scroll compressor
oil
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KR1020060127449A
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Korean (ko)
Inventor
조용일
박기원
장인종
김정훈
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엘지전자 주식회사
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Priority to KR1020060127449A priority Critical patent/KR20080054844A/en
Publication of KR20080054844A publication Critical patent/KR20080054844A/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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • 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
    • 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
    • F04C29/02—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

Abstract

A thrust bearing device for a scroll compressor is provided to reduce axial friction loss and wear between a driving shaft and a sub bearing. A thrust bearing device for a scroll compressor comprises a frame installed on a case charged with oil, a bearing housing(172), and a thrust bearing(173). The bearing housing is coupled to the frame and is formed with a bearing hole(172a) into which a driving shaft of an electromotor is inserted in a middle thereof. The thrust bearing is coupled to the bearing housing to axially support the lower end of the driving shaft. The bearing hole of the bearing housing is provided at a bottom end thereof with a bearing supporting protrusion(172b) to axially support the thrust bearing. The driving shaft includes an oil path(231), which is axially penetrated through the driving shaft.

Description

스크롤 압축기의 축방향 지지 장치{THRUST BEARING DEVICE FOR SCROLL COMPRESSOR}Axial support of scroll compressors {THRUST BEARING DEVICE FOR SCROLL COMPRESSOR}

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

도 2는 본 발명 스크롤 압축기에서 구동축의 축방향 지지 장치를 보인 단면도,Figure 2 is a cross-sectional view showing an axial support device of the drive shaft in the scroll compressor of the present invention,

도 3은 본 발명 스크롤 압축기에서 구동축의 축방향 지지 장치를 분해하여 보인 사시도,Figure 3 is an exploded perspective view of the axial support device of the drive shaft in the scroll compressor of the present invention,

도 4는 본 발명 스크롤 압축기에서 구동축의 축방향 지지상태에 대한 일실시예를 보인 단면도,Figure 4 is a cross-sectional view showing an embodiment for the axial support state of the drive shaft in the scroll compressor of the present invention,

도 5는 본 발명 스크롤 압축기에서 구동축의 축방향 지지상태에 대한 다른 실시예를 보인 단면도.Figure 5 is a cross-sectional view showing another embodiment of the axial support state of the drive shaft in the scroll compressor of the present invention.

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

170 : 서브프레임 171 : 프레임본체170: subframe 171: frame body

172 : 베어링하우징 172a : 축수구멍172: bearing housing 172a: bearing hole

172b : 베어링지지돌부 173 : 축방향 베어링172b: bearing support protrusion 173: axial bearing

230 : 구동축 231 : 오일유로230: drive shaft 231: oil passage

232 : 오일피더 310 : 고정스크롤232: oil feeder 310: fixed scroll

320 : 선회스크롤320: turning scroll

본 발명은 스크롤 압축기의 축방향 지지 장치에 관한 것으로서, 특히 구동축과 서브베어링 사이에서의 축방향 마찰손실을 줄일 수 있는 스크롤 압축기의 축방향 지지 장치에 관한 것이다.The present invention relates to an axial support device of a scroll compressor, and more particularly to an axial support device of a scroll compressor that can reduce the axial friction loss between the drive shaft and the sub-bearing.

일반적으로 스크롤 압축기는 공기조화기 분야에 널리 적용되는 고효율 저소음 압축기이다. 상기 스크롤 압축기는 선회운동을 하는 스크롤의 선회랩이 고정된 스크롤의 고정랩에 맞물려 연속으로 이동하는 두 개의 압축실을 형성하여 냉매를 각각 흡입하고, 이 각각의 압축실로 흡입되는 냉매는 상기 선회측 스크롤의 선회궤적을 따라 이동하면서 점차 압축되다가 최종 압축실에서 상기 케이스의 내부공간으로 연속 토출되는 방식이다.Generally, the scroll compressor is a high efficiency low noise compressor widely applied to the air conditioner field. The scroll compressor forms two compression chambers in which the swinging lap of the scroll which rotates in rotation is engaged with the fixed lap of the fixed scroll so as to continuously move, and the refrigerant is sucked into each of the compression chambers. It is gradually compressed while moving along the turning trajectory of the scroll and is continuously discharged from the final compression chamber into the inner space of the case.

도 1에 도시된 바와 같이 종래의 스크롤 압축기는, 그 내부에 밀폐공간이 형성되는 케이스(10)와, 상기 케이스(10)의 내부에 설치되어 구동력을 발생하는 전동기구부(20)와, 상기 전동기구부(20)에 결합되어 케이스(10)의 내부에서 냉매를 압축하는 압축기구부(30)로 이루어져 있다.As shown in FIG. 1, a conventional scroll compressor includes a case 10 having a sealed space therein, an electric mechanism 20 installed inside the case 10 to generate a driving force, and the electric transmission. Composed to the mechanism 20 is composed of a compression mechanism 30 for compressing the refrigerant in the case 10.

상기 케이스(10)는 고저압분리판(11)에 의해 저압부인 흡입공간(12)과 고압부인 토출공간(13)으로 구획되고, 상기 케이스(10)의 흡입공간(12)에는 냉매를 흡입하는 흡입관(14)이 설치되며, 상기 케이스(10)의 토출공간(13)에는 토출관(15)이 설치되어 있다.The case 10 is partitioned into a suction space 12, which is a low pressure part, and a discharge space 13, which is a high pressure part, by a high and low pressure separating plate 11, and sucks refrigerant into the suction space 12 of the case 10. The suction pipe 14 is installed, and the discharge pipe 15 is installed in the discharge space 13 of the case 10.

상기 전동기구부(20)는 케이스(10)의 내주면에 고정 설치되는 고정자(21)와, 상기 고정자(21)의 안쪽에 회전 가능하게 배치되는 회전자(22)와, 상기 회전자(22)의 중심에 결합되어 회전력을 압축기구부(30)에 전달하는 구동축(23)으로 이루어져 있다.The motor mechanism 20 includes a stator 21 fixedly installed on an inner circumferential surface of the case 10, a rotor 22 rotatably disposed inside the stator 21, and the rotor 22. It is composed of a drive shaft 23 coupled to the center to transmit the rotational force to the compression mechanism (30).

상기 압축기구부(30)는 인벌류트 형상의 고정랩(31a)이 구비되어 플레이트밸브(16)에 설치되는 고정스크롤(31)과, 상기 고정스크롤(31)의 고정랩(31a)에 맞물려 압축실(P)을 형성하도록 인벌류트 형상의 선회랩(32a)이 구비되어 상기 플레이트밸브(16)에 얹히는 선회스크롤(32)과, 상기 플레이트밸브(16)과 선회스크롤(32) 사이에 개재되어 그 선회스크롤(32)의 자전을 방지하는 올담링(33)을 포함하여 이루어져 있다.The compression mechanism (30) is provided with an involute-shaped fixed wrap (31a) is provided with a fixed scroll (31) installed on the plate valve 16, and the fixed wrap (31a) of the fixed scroll 31 in the compression chamber An involute swing wrap 32a is formed to form (P) and is interposed between the swing scroll 32 mounted on the plate valve 16 and the plate valve 16 and the swing scroll 32. The old dam ring 33 which prevents rotation of the turning scroll 32 is comprised.

도면중 미설명 부호인 16은 메인프레임, 17은 서브프레임, 23a는 오일유로, 24는 오일피더, 25는 베어링플레이트이다.In the drawings, reference numeral 16 denotes a main frame, 17 subframe, 23a an oil oil, 24 an oil feeder, and 25 a bearing plate.

상기와 같은 종래 스크롤 압축기는 다음과 같이 동작된다.The conventional scroll compressor as described above is operated as follows.

즉, 상기 전동기구부(20)의 구동축(23)이 회전자(22)와 함께 회전을 하면서 선회스크롤(32)이 올담링(33)에 의해 메인프레임(16)의 상면에서 편심 거리만큼 선회운동을 하게 된다. 이와 함께 상기 고정랩(31a)과 선회랩(32a)의 사이에는 초생달 모양의 압축실이 서로 대칭되도록 한 쌍의 압축실이 형성되고, 이 압축실은 상기 선회스크롤(32)의 선회궤적을 따라 중심을 향해 연속으로 이동하면서 체적이 점점 작아져 각 압축실의 냉매가 연속으로 압축되어 토출공간(13)으로 토출된다.That is, while the drive shaft 23 of the power mechanism unit 20 rotates with the rotor 22, the turning scroll 32 is rotated by an eccentric distance from the upper surface of the main frame 16 by the Old Daming 33. Will be In addition, a pair of compression chambers are formed between the fixed wrap 31a and the swing wrap 32a so that the crescent-shaped compression chambers are symmetrical with each other, and the compression chamber is centered along the pivot path of the swing scroll 32. The volume gradually decreases while continuously moving toward, and the refrigerant in each compression chamber is continuously compressed and discharged into the discharge space 13.

이때, 상기 구동축(23)은 그 구동축(23)의 상하 양측에 구비된 메인프레임(16)과 서브프레임(17))에 의해 반경방향으로 지지되고, 그 하단은 상기 서브프레임(17)에 결합된 베어링플레이트(25)에 의해 축방향으로 지지되어 있다.At this time, the drive shaft 23 is radially supported by the main frame 16 and the subframe 17 provided on the upper and lower sides of the drive shaft 23, the lower end is coupled to the subframe 17 It is supported by the bearing plate 25 in the axial direction.

그러나, 상기와 같은 종래 스크롤 압축기에 있어서는, 상기 구동축(23)의 하단이 서브프레임(17)에 구비된 베어링플레이트(25)에 접촉되어 고속으로 회전운동을 함에 따라 마찰손실이 발생하게 되고, 이 마찰손실로 인해 모터효율의 저하는 물론 장기간 운전시 접촉면에서 마모가 야기되는 문제점이 있었다.However, in the conventional scroll compressor as described above, as the lower end of the drive shaft 23 comes into contact with the bearing plate 25 provided in the subframe 17 and rotates at a high speed, friction loss occurs. As a result of frictional losses, there was a problem of deterioration of motor efficiency as well as wear on the contact surface during long-term operation.

본 발명은 상기와 같은 종래 스크롤 압축기가 가지는 문제점을 해결한 것으로, 상기 구동축과 서브프레임 사이에서 발생할 수 있는 축방향 마찰손실과 마모를 줄일 수 있는 스크롤 압축기의 축방향 지지 장치를 제공하려는데 본 발명의 목적이 있다.The present invention solves the problems of the conventional scroll compressor as described above, to provide an axial support device for a scroll compressor that can reduce the axial friction loss and wear that may occur between the drive shaft and the subframe. There is a purpose.

본 발명의 목적을 달성하기 위하여, 오일이 충전된 케이스에 설치되는 프레임; 상기 프레임에 결합되고 그 중앙부에 전동기구부의 구동축이 회전 가능하게 삽입되도록 축수구멍이 형성되는 베어링하우징; 및 상기 베어링하우징에 결합되어 상기 구동축의 하단이 축방향으로 지지되는 축방향 베어링;을 포함한 스크롤 압축기의 축방향 마찰 저감 장치를 제공한다.In order to achieve the object of the present invention, the frame is installed in the oil-filled case; A bearing housing coupled to the frame, the bearing housing having a shaft hole formed therein so as to rotatably insert a drive shaft of the power mechanism unit; And an axial bearing coupled to the bearing housing so that the lower end of the drive shaft is supported in the axial direction.

이하, 본 발명에 의한 스크롤 압축기의 축방향 마찰 저감 장치를 첨부도면에 도시한 일실시예에 의거하여 상세하게 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the axial friction reduction apparatus of the scroll compressor by this invention is demonstrated in detail based on one Example shown in an accompanying drawing.

도 2는 본 발명 스크롤 압축기에서 구동축의 축방향 지지 장치를 보인 단면도이고, 도 3은 본 발명 구동축의 축방향 지지 장치를 분해하여 보인 사시도이며, 도 4는 본 발명 구동축의 축방향 지지상태에 대한 일실시예를 보인 단면도이고, 도 5는 본 발명 구동축의 축방향 지지상태에 대한 다른 실시예를 보인 단면도이다.Figure 2 is a cross-sectional view showing an axial support device of the drive shaft in the scroll compressor of the present invention, Figure 3 is an exploded perspective view of the axial support device of the drive shaft of the present invention, Figure 4 is an axial support state of the drive shaft of the present invention 5 is a cross-sectional view showing an embodiment, Figure 5 is a cross-sectional view showing another embodiment of the axial support state of the drive shaft of the present invention.

이에 도시된 바와 같이 본 발명에 의한 스크롤 압축기는, 밀폐된 케이스(100)의 내부공간에 일정량의 오일이 채워지고, 단상유도전동기로 된 전동기구부(200)가 중간에 설치되며, 그 전동기구부(200)의 구동축(230)에 결합되는 선회스크롤(320)이 고정스크롤(310)과 맞물려 선회운동을 하면서 압축실(P)을 형성하는 압축기구부(300)가 상측에 설치된다.As shown in the scroll compressor according to the present invention, a certain amount of oil is filled in the inner space of the sealed case 100, and the electric mechanism part 200 made of a single-phase induction motor is installed in the middle, and the electric mechanism part ( While the rotating scroll 320 coupled to the driving shaft 230 of the 200 is engaged with the fixed scroll 310 to rotate, the compression mechanism 300 forming the compression chamber P is installed on the upper side.

상기 전동기구부(200)의 상하 양측에는 그 전동기구부(200)의 구동축(230)을 반경방향으로 지지하도록 메인프레임(160)과 서브프레임(170)이 각각 설치된다.The main frame 160 and the subframe 170 are respectively installed on the upper and lower sides of the power mechanism 200 to radially support the drive shaft 230 of the power mechanism 200.

상기 서브프레임(170)은 '삼발이'형상으로 형성되어 그 외주면이 상기 케이스(100)의 내주면에 용접 고정되는 프레임본체(171)와, 상기 프레임본체(171)에 볼트로 결합되어 지지되고 그 중앙에 상기 구동축(230)이 삽입되어 지지되도록 축수구멍(172a)이 형성되는 베어링하우징(172)과, 상기 베어링하우징(172)의 축수구멍(172a) 하단에 결합되어 상기 구동축(230)의 하단을 축방향으로 지지하는 축방향 베어링(173)으로 이루어진다.The subframe 170 is formed in a 'triangle' shape, the outer circumferential surface of which is welded and fixed to the inner circumferential surface of the case 100, and is supported by being bolted to the frame body 171 and the center thereof. A bearing housing 172 having a bearing hole 172a formed therein so that the driving shaft 230 is inserted into and supported at the lower end of the bearing shaft 172a of the bearing housing 172, thereby lowering the lower end of the driving shaft 230. An axial bearing 173 supporting in the axial direction.

상기 베어링하우징(172)은 그 축수구멍(172a)의 하단에 상기 축방향 베어링(173)이 얹혀져 지지되도록 환형 또는 돌기형의 베어링지지돌부(172b)가 형성된다. 상기 베어링지지돌부(172b)의 내경은 축방향 베어링(173)을 안정적으로 지지할 수 있는 범위 내에서 그 축방향 베어링(173)의 내경 보다는 크거나 같게 형성되는 것이 오일의 흡입을 방해하지 않아 바람직하다.The bearing housing 172 is formed with an annular or protruding bearing support protrusion 172b so that the axial bearing 173 is supported on the lower end of the bearing hole 172a. The inner diameter of the bearing support protrusion 172b is preferably larger than or equal to the inner diameter of the axial bearing 173 within a range capable of stably supporting the axial bearing 173 because it does not interfere with suction of oil. Do.

상기 축방향 베어링(173)은 축방향 하중을 지지할 수 있도록 스러스트 볼베어링 또는 스러스트 구면 롤러베어링과 같은 구름베어링으로 이루어진다. 상기 축방향 베어링(173)의 내경은 구동축을 안정적으로 지지할 수 있는 범위내에서 후술할 구동축(230)의 오일유로(231) 직경 보다 크거나 같게 형성하는 것이 오일의 흡입을 방해하지 않아 바람직하다.The axial bearing 173 is composed of a rolling bearing such as a thrust ball bearing or a thrust spherical roller bearing so as to support an axial load. The inner diameter of the axial bearing 173 is preferably formed to be larger than or equal to the diameter of the oil channel 231 of the drive shaft 230, which will be described later, within a range capable of stably supporting the drive shaft, because it does not interfere with suction of oil. .

상기 구동축(230)은 그 축방향으로 오일유로(231)가 관통 형성되고, 그 오일유로(231)의 하단에는 케이스(100)의 오일을 펌핑하도록 오일피더(232)가 설치된다.The oil passage 231 is formed in the drive shaft 230 in the axial direction thereof, and an oil feeder 232 is installed at the lower end of the oil passage 231 to pump oil of the case 100.

상기 오일피더(232)는 도 4에서와 같이 오일유로(231)의 안쪽, 즉 상기 축방향 베어링(173)과 중첩되지 않는 위치에 설치되거나, 또는 도 5에서와 같이 상기 축방향 베어링(173)을 통과하여 그 축방향 베어링(173)보다 하측으로 돌출되도록 설치될 수도 있다. 이 경우 오일의 흡입이 보다 원활하게 될 수 있다.The oil feeder 232 is installed inside the oil passage 231 as shown in FIG. 4, that is, at a position not overlapping with the axial bearing 173, or the axial bearing 173 as shown in FIG. 5. It may be installed to protrude downward from the axial bearing 173 through the through. In this case, the inhalation of the oil may be smoother.

도면중 미설명 부호인 110은 고저압분리판, 120은 흡입공간, 130은 토출공간, 140은 흡입관, 150은 토출관이다. In the drawings, reference numeral 110 denotes a high and low pressure separator, 120 denotes a suction space, 130 denotes a discharge space, 140 denotes a suction tube, and 150 denotes a discharge tube.

즉, 상기 전동기구부(200)의 고정자(210)에 전원을 인가하여 회전자(220)가 회전하면, 상기 구동축(230)이 회전자(220)와 함께 회전을 하면서 선회스크롤(320)을 선회운동시키고, 상기 선회스크롤(320)의 선회랩(321)이 고정스크롤(310)의 고정랩(311)과 맞물려 연속으로 이동하는 압축실(P)을 형성하며, 이 압축실(P)이 중 심으로 점차 이동하여 체적이 감소되면서 냉매가 압축되어 토출된다.That is, when the rotor 220 rotates by applying power to the stator 210 of the power mechanism unit 200, the driving shaft 230 rotates with the rotor 220 while turning the turning scroll 320. The rotating wrap 321 of the rotating scroll 320 is engaged with the fixed wrap 311 of the fixed scroll 310 to form a compression chamber (P) to move continuously, the compression chamber (P) is The refrigerant is compressed and discharged while gradually moving to the seam and decreasing in volume.

이때, 상기 구동축(230)은 그 상하 양단이 메인프레임(160)과 서브프레임(170)의 축수구멍(172a)에 삽입되어 회전하면서 반경방향으로 지지되고, 상기 구동축(230)의 하단은 서브프레임(170)의 축방향 베어링(173)에 얹혀져 축방향으로 지지된다. 상기 축방향 베어링(173)은 전술한 바와 같이 스러스트 볼베어링 또는 스러스트 구면 롤러베어링과 같은 구름베어링으로 이루어짐에 따라 상기 구동축(230)으로 전달되는 전동기구부(200)와 압축기구부(300)의 축방향 하중을 효과적으로 지지하면서도 마찰을 현저하게 줄일 수 있어 모터의 마찰손실을 낮추는 동시에 상기 구동축(230)과 베어링하우징(172) 사이의 마모를 줄여 압축기의 수명을 늘릴 수 있다.At this time, both ends of the drive shaft 230 are radially supported while being inserted into the shaft bore 172a of the main frame 160 and the subframe 170 and rotated, and the lower end of the drive shaft 230 is a subframe. It is mounted on the axial bearing 173 of 170 and is supported in the axial direction. As described above, the axial bearing 173 consists of rolling bearings such as thrust ball bearings or thrust spherical roller bearings, and thus the axial loads of the electric mechanism part 200 and the compression mechanism part 300 which are transmitted to the drive shaft 230. It can effectively reduce the friction while effectively reducing the friction loss of the motor and at the same time reduce the wear between the drive shaft 230 and the bearing housing 172 can increase the life of the compressor.

본 발명에 의한 스크롤 압축기의 축방향 지지 장치는, 상기 서브프레임에 구름베어링과 같은 축방향 베어링을 설치함으로써, 상기 구동축과 서브프레임 사이의 마찰손실과 마모를 효과적으로 줄여 압축기의 효율과 신뢰성을 함께 높일 수 있다.In the axial support device of the scroll compressor according to the present invention, by installing an axial bearing such as a rolling bearing in the subframe, the friction loss and wear between the drive shaft and the subframe can be effectively reduced to increase the efficiency and reliability of the compressor. Can be.

Claims (6)

오일이 충전된 케이스에 설치되는 프레임;A frame installed in the oil-filled case; 상기 프레임에 결합되고 그 중앙부에 전동기구부의 구동축이 회전 가능하게 삽입되도록 축수구멍이 형성되는 베어링하우징; 및 A bearing housing coupled to the frame, the bearing housing having a shaft hole formed therein so as to rotatably insert a drive shaft of the power mechanism unit; And 상기 베어링하우징에 결합되어 상기 구동축의 하단이 축방향으로 지지되는 축방향 베어링;을 포함한 스크롤 압축기의 축방향 마찰 저감 장치.And an axial bearing coupled to the bearing housing to support a lower end of the drive shaft in an axial direction. 제1항에 있어서,The method of claim 1, 상기 베어링하우징의 축수구멍 하단에는 상기 축방향 베어링을 축방향으로 지지하도록 베어링지지돌부가 형성되는 스크롤 압축기의 축방향 마찰 저감 장치.An axial friction reduction apparatus of a scroll compressor having a bearing support protrusion formed at the lower end of the bearing hole of the bearing housing to support the axial bearing in the axial direction. 제1항에 있어서,The method of claim 1, 상기 축방향 베어링은 구름베어링인 것을 특징으로 하는 스크롤 압축기의 축방향 마찰 저감 장치.And the axial bearing is a rolling bearing. 제3항에 있어서,The method of claim 3, 상기 구동축은 축방향으로 오일유로가 관통 형성되고, 상기 축방향 베어링의 내경은 오일유로의 직경 보다 같거나 크게 형성되는 스크롤 압축기의 축방향 마찰 저감 장치.The drive shaft is formed in the axial direction through the oil passage, the inner diameter of the axial bearing is formed in the axial friction reduction apparatus of the scroll compressor of the same or larger than the diameter of the oil passage. 제3항에 있어서,The method of claim 3, 상기 구동축은 축방향으로 오일유로가 관통 형성되고, 그 오일유로 하단에는 케이스의 오일을 흡입하기 위한 오일피더가 상기 오일유로의 내부에 위치하도록 설치되는 스크롤 압축기의 축방향 마찰 저감 장치.The drive shaft is formed in the axial direction through the oil passage, the lower end of the oil passage axial friction reduction apparatus of the scroll compressor is installed so that the oil feeder for sucking the oil of the case is located inside the oil passage. 제3항에 있어서,The method of claim 3, 상기 구동축은 축방향으로 오일유로가 관통 형성되고, 그 오일유로의 하단에는 케이스의 오일을 흡입하기 위한 오일피더가 상기 구름베어링을 통과하도록 설치되는 스크롤 압축기의 축방향 마찰 저감 장치. The drive shaft has an oil passage penetrating in the axial direction, the lower end of the oil passage is an axial friction reduction device of the scroll compressor is installed so that the oil feeder for sucking the oil of the case passes through the rolling bearing.
KR1020060127449A 2006-12-13 2006-12-13 Thrust bearing device for scroll compressor KR20080054844A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045886A1 (en) * 2022-09-01 2024-03-07 广东美的环境科技有限公司 Pump body assembly, compressor and refrigeration apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045886A1 (en) * 2022-09-01 2024-03-07 广东美的环境科技有限公司 Pump body assembly, compressor and refrigeration apparatus

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