KR20020015113A - Vacuum pump - Google Patents

Vacuum pump Download PDF

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Publication number
KR20020015113A
KR20020015113A KR1020000048259A KR20000048259A KR20020015113A KR 20020015113 A KR20020015113 A KR 20020015113A KR 1020000048259 A KR1020000048259 A KR 1020000048259A KR 20000048259 A KR20000048259 A KR 20000048259A KR 20020015113 A KR20020015113 A KR 20020015113A
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KR
South Korea
Prior art keywords
housing
oil
vacuum pump
rotor
lubricating oil
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Application number
KR1020000048259A
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Korean (ko)
Inventor
남충근
Original Assignee
이계안
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 이계안, 현대자동차주식회사 filed Critical 이계안
Priority to KR1020000048259A priority Critical patent/KR20020015113A/en
Publication of KR20020015113A publication Critical patent/KR20020015113A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30Rotary-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
    • F04C18/34Rotary-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
    • F04C18/344Rotary-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 inner member
    • 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
    • F04B39/12Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121Casings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02Lubrication; Lubricant separation
    • F04C29/028Means for improving or restricting lubricant flow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings

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

Abstract

PURPOSE: A vacuum pump is provided to prevent the generation of a noise due to the oil drained at a time by forming an oil recess on the inner wall of a vacuum pump housing and reducing the amount of oil drained when the instantaneous engine output is increased. CONSTITUTION: A vacuum pump housing(11) is cylindrical. An air intake port(15) is formed on a portion of the housing, and an oil inlet(16) through which a lubricating oil to lubricate the inside of the housing is formed at an upper portion of the air intake port. The air and lubricating oil supplied from the air intake port and the oil inlet are drained through a drain port(17) by the rotation of a blade(14). An oil recess(20) is formed on the inner face of the housing. The oil recess temporarily stores the residual lubricating oil when an engine idles. The instantaneous amount of the lubricating oil drained through the drain port is reduced. Therefore, a noise in the oil is avoided.

Description

진공펌프{Vacuum Pump}Vacuum Pump

본 발명은 자동차의 진공펌프에 관한 것으로, 보다 상세하게는 엔진 아이들시에 윤활을 위해 하우징 내로 유입되었다가 고출력시 일시에 배출구로 배출되는 오일에 의해 발생하는 소음을 방지하기 위하여 진공펌프 하우징의 내부벽에 잔류오일이 고일 수 있는 오일홈을 형성한 진공펌프에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum pump of an automobile, and more particularly, to an internal wall of a vacuum pump housing in order to prevent noise generated by oil flowing into the housing for lubrication during engine idle and discharged to the outlet at a high power output. The present invention relates to a vacuum pump having an oil groove in which residual oil may accumulate.

일반적으로 진공펌프는 엔진의 하단부에 형성되어 있으며, 상기 진공펌프의 하우징에 형성되어 있는 로터의 회전에 의해 공기유입구로 에어탱크의 공기를 흡입한 후 배출구로 배출하므로서 상기한 에어탱크가 진공의 상태가 되도록 하고, 그 진공의 에어로 브레이크를 동작시켜주는 부스터로 보내져 자동차를 제동할 수 있도록 하는 아주 중요한 역활을 하는 것이다.In general, the vacuum pump is formed at the lower end of the engine, the air tank is in a vacuum state by sucking the air of the air tank through the air inlet and discharged to the outlet by the rotation of the rotor formed in the housing of the vacuum pump To the booster that activates the vacuum aero brake and plays a very important role in braking the car.

상기한 진공펌프는 일반적으로 도 3과 같이 형성되며, 하우징(1) 내부에는 로터(3)가 하우징(1)의 중심선과 편심되게 편심축(2)에 축삽되어 있으며, 상기 로터(3)의 외주에는 브레이드(4)가 다수 형성되어 있다.The vacuum pump is generally formed as shown in FIG. 3, and the rotor 3 is inserted into the eccentric shaft 2 so as to be eccentric with the center line of the housing 1. A plurality of braids 4 are formed on the outer circumference.

그리고 상기한 브레이드(4)는 로터(3)의 외주홈(3a)에 일단이 삽입된 상태이며, 로터의 회전에 따라 상기한 브레이드(4)가 하우징(1)의 내부벽면과 접하면서 회전할 수 있도록 구성되어 있다. 하우징(1)의 내부벽면에는 에어탱크의 공기를 유입하는 공기유입구(5)가 형성되어 있고, 상기한 공기유입구(5)의 상측으로는 로터(3)와 브레이드(4)의 회전을 원활하게 하기 위해 윤활유가 공급될 수 있도록 오일유입구(6)가 형성되어 있다. 그리고 상기한 공기유입구(5)의 타측으로는 하우 징(1)내로 유입된 공기와 윤활유가 로터(3)와 브레이드(4)의 회전에 의해 하우징 (1) 외부로 배출될 수 있도록 배출구(7)가 형성되어 있다.The braid 4 has one end inserted into the outer circumferential groove 3a of the rotor 3, and the braid 4 can rotate while contacting the inner wall surface of the housing 1 as the rotor rotates. It is configured to be. An air inlet 5 for introducing air from the air tank is formed on the inner wall of the housing 1, and the rotor 3 and the braid 4 are smoothly rotated above the air inlet 5. In order to supply lubricating oil, an oil inlet 6 is formed. And the other side of the air inlet (5) outlet 7 so that the air and lubricating oil introduced into the housing (1) can be discharged to the outside of the housing (1) by the rotation of the rotor 3 and the braid (4) ) Is formed.

상기한 진공펌프의 작동은 엔진의 회전속도와 비례하여 작동되며, 동력축으로부터 진공펌프의 편심축(2)에 동력이 전달되면 상기한 하우징(1)내의 로터(3)와 브레이드(4)가 회전하게 된다. 이와 같이 로터(3)와 브레이드(4)가 회전하게 되면 하우징(1) 내에는 그 회전에 의해 흡입력이 발생되므로 공기유입구(5)로 에어탱크의 공기를 흡입하게 된다. 이때 오일유입구(6)에는 오일펌프에서 공급되는 윤활유가 공급되어 상기한 브레이드(4)가 원활히 회전할 수 있도록 한다. 상기와 같이 유입된 공기와 윤활유는 브레이드(4)의 회전에 의해 배출구(7)로 함께 배출된다.The operation of the vacuum pump is operated in proportion to the rotational speed of the engine. When power is transmitted from the power shaft to the eccentric shaft 2 of the vacuum pump, the rotor 3 and the braid 4 in the housing 1 are operated. Will rotate. As the rotor 3 and the braid 4 rotate in this way, since suction force is generated by the rotation of the housing 1, the air inlet 5 sucks air from the air tank. At this time, the oil inlet 6 is supplied with the lubricating oil supplied from the oil pump to allow the braid 4 to rotate smoothly. The air and the lubricating oil introduced as described above are discharged together to the outlet 7 by the rotation of the braid 4.

그런데, 엔진의 아이들시에는 상기한 진공펌프로 공기의 흡입이 필요없을 때가 있게 되는데, 이 때 진공펌프의 회전이 저속상태가 되므로 윤활을 위해 유입된 윤활유는 완전히 배출되지 않고 그 중 소량의 윤활유가 하우징 내부에 잔류하게 된다. 따라서 잔류되었던 윤활유는 어느 순간 하우징 내의 압력이 상승하게 되면 배출구(7)로 빠져 나가면서 캐비테이션(Cavitation)이 생겨 "지잉잉"하는 소음이 발생하는 문제점이 있었다.By the way, when the engine is idle, there is a case where the suction of the air is not necessary with the vacuum pump. At this time, since the rotation of the vacuum pump becomes a low speed state, the lubricating oil introduced for lubrication is not completely discharged, and a small amount of the lubricant is It will remain inside the housing. Therefore, the residual lubricating oil has a problem in that when the pressure in the housing rises at any moment, the cavitation occurs as it exits to the outlet 7, causing the noise of "grounding".

따라서 본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 보다 상세하게는 진공펌프의 하우징을 윤활하기 위하여 공급되는 윤활유가 엔진 아이들시에 잔류될 수 있는 별도의 공간을 형성하여 진공펌프내의 순간압력이 상승될 때 발생하는 소음을 방지하는 진공펌프를 제공하는 데 목적이 있다.Accordingly, the present invention has been made to solve the above problems, more specifically, the instantaneous pressure in the vacuum pump by forming a separate space in which the lubricant supplied to lubricate the housing of the vacuum pump can remain in the engine idle It is an object of the present invention to provide a vacuum pump for preventing the noise generated when it is raised.

본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,

하우징 내부로 편심축에 의해 축삽되며 그 외주에 다수의 홈이 형성된 로터와, 상기 로터의 외주에 형성된 홈에 외향돌설되어 로터와 함께 회전하도록 형성된 브레이드와, 상기 하우징의 일측으로 에어탱크와 연결되어 공기가 흡입되는 공기흡입구와, 상기 공기흡입구 상측에 형성되어 하우징 안을 윤활하기 위한 윤활유가 공급되도록 형성된 오일유입구와, 상기한 공기흡입구와 오일유입구에서 공급된 공기와 윤활유가 브레이드의 회전에 의해 밀려 배출되도록 상기 하우징의 다른 일측에 형성된 배출구로 구성되어서, 상기 로터와 브레이드의 회전에 의해 에어탱크의 공기를 흡입한 후 배출구로 배출하므로서 상기 에어탱크를 진공의 상태로 유지하도록 하는 진공펌프에 있어서,A rotor inserted into the housing by an eccentric shaft and having a plurality of grooves formed on an outer circumference thereof, a braid formed outwardly in a groove formed on the outer circumference of the rotor to rotate together with the rotor, and connected to an air tank to one side of the housing An air inlet through which air is sucked in, an oil inlet formed above the air inlet to supply lubricating oil to lubricate the inside of the housing, and air and lubricant supplied from the air inlet and the oil inlet are pushed out by rotation of the braid. In the vacuum pump to be configured to the discharge port formed on the other side of the housing so as to suck the air of the air tank by the rotation of the rotor and the braid and to discharge to the discharge port in the vacuum pump,

상기한 하우징의 하단중앙부에 별도의 오일홈을 형성하여 엔진 아이들시 상기 오일유입구에서 유입된 윤활유를 임시 보관하므로서 엔진의 순간출력이 커질 경우 일시에 배출구로 배출되는 윤활유의 양을 감소하여 소음을 저감하는 것을 특징으로 한다.By forming a separate oil groove at the center of the lower end of the housing to temporarily store the lubricating oil flowing from the oil inlet when the engine is idle, when the instantaneous output of the engine increases, the amount of lubricating oil discharged to the outlet at a time is reduced to reduce noise. Characterized in that.

도 1은 본 발명에 의한 진공펌프의 정단면도.1 is a front sectional view of a vacuum pump according to the present invention.

도 2는 본 발명에 의한 진공펌프 하우징의 측단면도.Figure 2 is a side sectional view of a vacuum pump housing according to the present invention.

도 3은 종래 진공펌프의 정단면도.Figure 3 is a front sectional view of a conventional vacuum pump.

도 4는 종래 진공펌프 하우징의 측단면도.Figure 4 is a side cross-sectional view of a conventional vacuum pump housing.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

10 : 진공펌프 11 : 하우징10 vacuum pump 11 housing

12 : 편심축 13 : 로터12: eccentric shaft 13: rotor

13a : 홈 14 : 브레이드13a: home 14: braid

15 : 공기유입구 16 : 오일유입구15: air inlet port 16: oil inlet port

17 : 배출구 20 : 오일홈17: outlet 20: oil groove

본 발명의 실시예를 첨부한 도면에 따라 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의한 진공펌프의 정단면도이고, 도 2는 본 발명에 의한 진공펌프 하우징의 측단면도로서, 도면부호 10은 진공펌프이고 11은 진공펌프의 하우징이다.1 is a front sectional view of a vacuum pump according to the present invention, Figure 2 is a side sectional view of a vacuum pump housing according to the present invention, 10 is a vacuum pump and 11 is a housing of the vacuum pump.

상기한 진공펌프(10)의 하우징(11)은 원통형으로 구성되며, 엔진의 하단부에 결합될 수 있도록 그 외주에 볼트결합부(11a)들이 형성된다. 그리고 상기한 하우징(11)의 내부에는 환형의 로터(13)가 상기 하우징(11)의 중심선과 편심된 편심축(12)에 축삽되어 있다. 그리고 상기 로터(13)의 외주에는 다수의 홈(13a)이 형성되며, 그 홈(13a)에는 판재의 블레이드(14)가 외향돌설되어 상기 로터(13)의 회전과 함께 회전하도록 구성되어 있다.The housing 11 of the vacuum pump 10 has a cylindrical shape, and bolt coupling portions 11a are formed on the outer circumference thereof so as to be coupled to the lower end of the engine. In the inside of the housing 11, an annular rotor 13 is inserted into an eccentric shaft 12 which is eccentric with the center line of the housing 11. A plurality of grooves 13a are formed on the outer circumference of the rotor 13, and the blades 14 of the plate are protruded outwardly in the grooves 13a so as to rotate together with the rotation of the rotor 13.

또한, 상기 하우징(11)의 일측으로 에어탱크와 연결되어 공기가 흡입되는 공기흡입구(15)가 형성되어 있으며, 상기 공기흡입구(15) 상측에 하우징(11)을 안을 윤활하기 위한 윤활유가 유입되는 오일유입구(16)가 형성되어 있고, 상기한 공기흡입구(15)와 오일유입구(16)에서 공급된 공기와 윤활유가 브레이드(14)의 회전에 의해 밀려 배출되도록 상기 하우징(11)의 다른 일측에 배출구(17)가 형성되어 있다.In addition, an air inlet 15 is formed at one side of the housing 11 to be connected to the air tank, and the air is sucked therein, and lubricating oil for lubricating the inside of the housing 11 is introduced into the air inlet 15. An oil inlet 16 is formed, and air and lubricating oil supplied from the air inlet 15 and the oil inlet 16 are pushed out by the rotation of the braid 14 and discharged to the other side of the housing 11. An outlet 17 is formed.

그리고, 본 발명은 이상과 같이 내주연에 공기흡입구(15), 오일유입구(16), 배출구(17)가 형성되는 진공펌프의 하우징(11) 내주연에 본 발명의 목적을 달성하기 위한 별도의 오일홈(20)을 추가로 형성한다.In addition, the present invention is separate to achieve the object of the present invention in the inner circumference of the housing 11 of the vacuum pump in which the air inlet 15, oil inlet 16, outlet 17 is formed on the inner circumference as described above The oil groove 20 is further formed.

상기 오일홈(20)이 형성되는 위치는 공기흡입구(15)와 배출구(17)의 사이, 즉 하우징(11)의 내주연 하부중앙부에 형성하는 것이 바람직하다.Where the oil groove 20 is formed is preferably formed between the air inlet 15 and the outlet 17, that is, the inner peripheral lower center of the housing (11).

상기한 오일홈(20)은 윤활을 위해 하우징(11)내로 유입된 윤활유가 엔진이 아이들시인 경우에는 완전히 배출구(17)로 배출되지 못하고 잔류하게 되는데, 이 잔류되는 윤활유를 잠시 보관하기 위한 것이다.The oil groove 20 is left in the lubricating oil introduced into the housing 11 for lubrication is not completely discharged to the outlet 17 when the engine is idle, it is for storing the residual lubricating oil for a while.

이상과 같이 구성된 진공펌프의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the vacuum pump configured as described above are as follows.

상기한 진공펌프(10)는 엔진 아이들시에 발생하는 소음을 저감하기 위한 것이므로 엔진이 아이들시인 경우에 진공펌프의 작동상태를 설명하도록 한다.Since the vacuum pump 10 is for reducing noise generated when the engine is idle, the operation state of the vacuum pump will be described when the engine is idle.

종래의 진공펌프는 엔진이 아이들시인 경우에 오일유입구에서 유입되는 윤활유가 제 때에 배출구로 배출되지 못하고 하우징 내에 잔류되어 있다가, 진공펌프 내의 순간 압력이 높아지면 일시에 하우징 내에 잔류되어 있던 윤활유가 배출구로쏠리면서 캐비테이션이 발생하여 소음의 원인이 되었다.In the conventional vacuum pump, when the engine is idle, lubricant oil flowing from the oil inlet is not discharged to the discharge port in time, but remains in the housing. When the instantaneous pressure in the vacuum pump becomes high, the lubricant remaining in the housing is temporarily discharged. Cavitation occurred as a cause of noise.

그러나 본 발명에 의한 진공펌프(10)의 경우에는 하우징(11)의 내주연에 별도의 오일홈(20)을 형성하므로서 엔진 아이들시인 경우에 윤활을 위해 유입됐던 윤활유가 완전히 배출구(17)로 빠져 나가지 못하게 되면 그 잔류된 윤활유는 상기 오일홈(20)에 고여 있게 된다. 이렇게 오일홈(20)에 고여 있던 윤활유는 엔진의 회전수에 비례하여 로터(13)와 블레이드(14)의 회전속도가 빨라져 순간압력이 커지면 일시에 배출구(17)로 배출되게 된다. 이때 배출되는 윤활유는 종전과 달리 오일홈(20)에 고여 넘치는 윤활유만 배출되므로 일시에 배출구(17)로 배출되는 윤활유의 양은 종래의 기술에서 배출되는 윤활유의 양보다 오일홈(20)의 체적만큼 줄어들게 되고, 그 만큼 소음의 원인이 되는 캐비테이션도 줄어들게 되는 것이다.However, in the case of the vacuum pump 10 according to the present invention, since a separate oil groove 20 is formed at the inner circumference of the housing 11, the lubricating oil introduced for lubrication when the engine is idle is completely drained to the outlet 17. If it does not go out, the remaining lubricant is accumulated in the oil groove (20). The lubricating oil accumulated in the oil groove 20 is discharged to the outlet 17 at a time when the rotational speed of the rotor 13 and the blade 14 increases in proportion to the number of revolutions of the engine and the instantaneous pressure increases. At this time, since the lubricating oil discharged is discharged only the lubricating oil accumulated in the oil groove 20 unlike before, the amount of the lubricating oil discharged to the outlet 17 at a time is as much as the volume of the oil groove 20 than the amount of the lubricating oil discharged in the prior art. The less cavitation that causes noise, the less will be reduced.

즉, 엔진 아이들시 하우징(11)에 잔류하고 있던 윤활유가 일시에 배출구(17)로 쏠리면서 발생하는 소음의 크기는 일시에 배출되는 윤활유의 양과 비례되므로 엔진이 아이들시에서 고출력으로 바뀌면서 하우징내에 순간압력이 높아지더라도 하우징에 잔류되어 있다가 순간에 배출구로 나가는 윤활유의 양이 적어져서 소음이 격감되는 것이다.That is, since the amount of noise generated when the lubricant remaining in the housing 11 when the engine is idle is directed to the discharge port 17 at a time is proportional to the amount of lubricant discharged at the moment, the engine changes to a high output at the time of idling. Even if the pressure increases, the amount of lubricant remaining in the housing and going out to the outlet at the moment decreases the noise.

그리고, 엔진이 고속 출력시에는 오일홈(20)에 고여 있던 윤활유는 로터(13)와 블레이더(14)의 회전압에 의해 배출구로 조금씩 나뉘어져 배출된다.And when the engine outputs at high speed, the lubricating oil accumulated in the oil groove 20 is divided into the discharge port little by little by the rotational pressure of the rotor 13 and the bladder 14, and discharged.

특히, 본 발명에 의한 진공펌프(10)는 아이들시 주요주파수 대역 소음이 2.3dBA 감소하며, 1300rpm 영역에서만 미약한 소음이 발생할 뿐 아이들시나 노로드(No noad) 조건에서는 이음이 발생하지 않게 된다.In particular, in the vacuum pump 10 according to the present invention, the main frequency band noise is reduced by 2.3 dBA when idle, and only a weak noise occurs in the 1300 rpm region, and no noise occurs during idle or no nod conditions.

이상과 같이 진공펌프의 하우징 내면에 오일홈을 형성하면 엔진 아이들시에 윤활을 위해 유입되다가 배출구로 완전히 빠져나가지 못한 윤활유를 고여 있게 하므로서, 하우징 내의 순간압력 상승시 하우징 내에 잔류되어 있다가 일시에 배출구로 배출되는 윤활유의 양을 줄일 수 있으므로 소음을 저감하는 데 커다란 효과가 있다. 또한, 본 발명에 의한 진공펌프는 아이들시 주요주파수 대역 소음이 2.3dBA 감소하며, 1300rpm 영역에서만 미약한 소음이 발생할 뿐 아이들시나 노로드(No noad) 조건에서는 이음이 발생하지 않게 되는 커다란 장점이 있는 것이다.As described above, if the oil groove is formed on the inner surface of the vacuum pump housing, the lubricating oil that enters for lubrication during engine idle and does not completely escape to the exhaust port is held in the housing. Since the amount of lubricant discharged can be reduced, it has a great effect on reducing noise. In addition, the vacuum pump according to the present invention has a great advantage that the main frequency band noise is reduced by 2.3dBA when idle, only a weak noise occurs only in the 1300rpm region, no noise occurs during idle or no noad conditions. will be.

Claims (1)

하우징(11)내부로 편심축(12)에 의해 축삽되며 그 외주에 다수의 홈(13a)이 형성된 로터(13)와, 상기 로터(13)의 외주에 형성된 홈(13a)에 외향돌설되어 로터(13)와 함께 회전하도록 형성된 브레이드(14)와, 상기한 하우징(11)의 내주연에 공기흡입구(15), 오일유입구(16), 배출구가 형성되어서 상기 로터(13)와 브레이드(14)의 회전에 의해 에어탱크의 공기를 흡입한 후 배출구(17)로 배출하므로서 상기 에어탱크를 진공의 상태로 유지하도록 하는 진공펌프에 있어서,The rotor 13 is inserted into the housing 11 by the eccentric shaft 12 and has a plurality of grooves 13a formed on its outer circumference, and outwardly protrudes into the groove 13a formed on the outer circumference of the rotor 13. The air inlet 15, the oil inlet 16, and the outlet are formed on the inner circumference of the housing 11 and the braid 14 formed to rotate together with the rotor 13, so that the rotor 13 and the braid 14 are formed. In the vacuum pump to suck the air in the air tank by the rotation of the discharge port 17 and to maintain the air tank in a vacuum state, 상기한 하우징(11)의 내주면상에 별도의 오일홈(20)을 형성하여 엔진 아이들시 상기 오일유입구(16)에서 유입된 윤활유를 임시 보관하므로서 엔진의 순간출력이 커질 경우 일시에 배출구(17)로 배출되는 윤활유의 양을 감소하여 소음을 저감하는 것을 특징으로 하는 진공펌프.By forming a separate oil groove 20 on the inner circumferential surface of the housing 11 to temporarily store the lubricating oil introduced from the oil inlet 16 when the engine is idle, the outlet 17 at the moment when the instantaneous output of the engine is increased Vacuum pump, characterized in that to reduce the amount of lubricant discharged to reduce the noise.
KR1020000048259A 2000-08-21 2000-08-21 Vacuum pump KR20020015113A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557678A (en) * 1983-06-21 1985-12-10 Mitsubishi Denki Kabushiki Kaisha Pump device
JPH07119648A (en) * 1993-10-15 1995-05-09 Jidosha Kiki Co Ltd Variable displacement type vane pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557678A (en) * 1983-06-21 1985-12-10 Mitsubishi Denki Kabushiki Kaisha Pump device
JPH07119648A (en) * 1993-10-15 1995-05-09 Jidosha Kiki Co Ltd Variable displacement type vane pump

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