KR0125306B1 - A rotary oil pump having by-pass circuit - Google Patents

A rotary oil pump having by-pass circuit

Info

Publication number
KR0125306B1
KR0125306B1 KR1019940014794A KR19940014794A KR0125306B1 KR 0125306 B1 KR0125306 B1 KR 0125306B1 KR 1019940014794 A KR1019940014794 A KR 1019940014794A KR 19940014794 A KR19940014794 A KR 19940014794A KR 0125306 B1 KR0125306 B1 KR 0125306B1
Authority
KR
South Korea
Prior art keywords
oil pump
inner rotor
plunger
rotor
rotary oil
Prior art date
Application number
KR1019940014794A
Other languages
Korean (ko)
Other versions
KR960001412A (en
Inventor
안상천
오윤석
Original Assignee
김태구
대우자동차주식회사
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.)
Filing date
Publication date
Application filed by 김태구, 대우자동차주식회사 filed Critical 김태구
Priority to KR1019940014794A priority Critical patent/KR0125306B1/en
Publication of KR960001412A publication Critical patent/KR960001412A/en
Application granted granted Critical
Publication of KR0125306B1 publication Critical patent/KR0125306B1/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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
    • 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
    • F04C2240/20—Rotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The rotary type oil pump, as used in an engine of an automotor, includes an internal rotor(20) and an external rotor(30) which are installed eccentric to each other on a body(10) thereof. The internal rotor(20) is provided with a plunger(24) which is elastically supported by a spring(25) and is operated by means of the centrifugal force of the internal rotor(20), whereby the operation of the plunger(24) forms a bypass path(23), without any additional bypass valve. The internal rotor(20) forms an operation groove(22) in a radius direction on a tooth(21) thereof, and forms the bypass path(23) crossing to the operation groove(22) and connected to the both sides of the tooth(21). The plunger(24), which is supported by menas of the spring(25) and is covered with a cap(26), is inserted into the operation groove(22).

Description

바이패스로가 내부로터에 설치된 로터리식 오일펌프Rotary oil pump with bypass passage installed in the inner rotor

제1도는 일반적인 로터리식 오일펌프의 회전수-유량에 대한 특성 곡선.1 is a characteristic curve for the rotational speed-flow rate of a typical rotary oil pump.

제2도는 본 발명의 분해 사시도.2 is an exploded perspective view of the present invention.

제3도는 본 발명의 작동상태 단면도.3 is a cross-sectional view of the operating state of the present invention.

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

10 : 몸체, 20 : 내부로터,10: body, 20: inner rotor,

21 : 이,22 : 작동홈,21: tooth, 22: working groove,

23 : 바이패스로,24 : 플런저,23: Bypass, 24: Plunger,

25 : 스프링,26 : 캡,25: spring, 26: cap,

30 : 외부로터.30: external rotor.

본 발명은 자동차 엔진에 사용되는 로터리식 오일펌프에 관한 것으로, 특히, 바이패스로가 내부로터에 설치된 로터리식 오일펌프에 관한 것이다.The present invention relates to a rotary oil pump for use in an automobile engine, and more particularly, to a rotary oil pump provided with a bypass path in an inner rotor.

종래의 자동차 엔진용 오일펌프로서 일반적으로 사용되고 있는 로터리식 오일펌프는 트로코이드 곡선에 의해 형성된 내부로터와 외부로터가 편심되게 조립되어 있다. 내부로터의 잇수보다 외부로터의 잇수가 한개 더 많아 크래크축에 회전되게 설치된 내부로터를 회전시키면 내부로터의 이가 외부로터의 이 사이에 차례로 끼어들어감으로 인해 내·외부로터 사이에 생긴 공간의 용적이 변하게 되며, 공간용적이 증가하는 곳에서 흡입되어 반대쪽으로 옮겨진다. 그리고 공간용적이 감소함에 따라 압력증가로 인해 배출구로 밀려나가는 구조로 되어 있다.Rotary oil pumps, which are generally used as oil pumps for automobile engines in the related art, are eccentrically assembled with an inner rotor and an outer rotor formed by a trocoid curve. If the number of teeth of the outer rotor is larger than the number of teeth of the inner rotor and the inner rotor is rotated on the crack shaft, the volume of the space between the inner and outer rotor will be reduced due to the teeth of the inner rotor being interposed between the teeth of the outer rotor. It is changed, and it is sucked in the place where the space volume increases and moved to the opposite side. As the space volume decreases, it is pushed to the outlet due to the pressure increase.

종래의 오일펌프는 엔진 회전수에 따라 오일량이 증가하는데, 엔진 회전수가 일정한계 이상으로 높아지면 오일펌프에 부착된 바이패스밸브(by-pass valve)가 열려서 에너지를 소비하며, 압축된 오일을 오일팬으로 되돌려 보낸다.In conventional oil pumps, the amount of oil increases according to the engine speed. When the engine speed rises above a certain level, a bypass valve attached to the oil pump opens to consume energy. Send back to the fan.

제1도는 일반적인 로터리식 오일펌프의 회전수-유량에 대한 특성 곡선이다.1 is a characteristic curve for the rotational speed-flow rate of a general rotary oil pump.

제1도에 도시한 바와같이, 실제 엔진의 윤활을 위해 요구되는 오일의 양은 실선과 같으나, 종래의 오일펌프의 유량 특성은 점선과 같이 증가하므로, 빗금친 부분에 해당하는 잉여오일은 오일펌프의 몸체에 부착된 바이패스 밸브를 통해 오일팬으로 돌려보낸다.As shown in FIG. 1, the amount of oil required for actual lubrication of the engine is the same as the solid line, but the flow rate characteristic of the conventional oil pump increases as the dashed line, so that the excess oil corresponding to the hatched portion of the oil pump Return to the oil pan through the bypass valve attached to the body.

이와같이 종래의 로터식 오일펌프는 몸체에 별도의 바이패스 밸브를 마련하여야 하므로 가격이 비싸지고 잉여오일을 바이패스 밸브를 통하여 오일팬으로 돌려보냄으로 에너지 손실이 되고, 내·외부로터에 의해 생긴 공간용적간의 압력차가 커서 맥동현상이 발생되는 문제점이 있었다.In this way, the conventional rotor oil pump has to provide a separate bypass valve in the body is expensive, the energy is lost by returning the surplus oil to the oil pan through the bypass valve, the space created by the internal and external rotor There was a problem that pulsation occurred due to the large pressure difference between the volumes.

본 발명은 이와같은 점을 감안하여, 로터리식 오일펌프의 내부로터에 스프링으로 탄지지된 플런저를 내부로터의 원심력에 의해 작동되도록 함으로써 로터리식 오일펌프의 내부로터에 바이패스로를 갖도록 한다. 상기와 같은 본 발명은 별도의 바이패스 밸브를 설치하지 않아도 되므로 가격절감이 되고, 잉여오일을 오일팬으로 회송하지 않아도 되므로, 이에 따른 에너지 손실을 초래하지 않으며, 오일펌프 내부의 압력차를 작게하여 맥동현상이 방지되도록 한 것이다.In view of the above, the present invention allows the plunger supported by the spring to the inner rotor of the rotary oil pump to be operated by the centrifugal force of the inner rotor to have a bypass passage in the inner rotor of the rotary oil pump. Since the present invention as described above does not need to install a separate bypass valve, the cost is reduced, and since the redundant oil does not need to be returned to the oil pan, it does not cause energy loss, thereby reducing the pressure difference inside the oil pump. This is to prevent pulsation.

이하, 본 발명의 일실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 몸체(10)에 내부로터(20)와, 외부로터(30)가 편심되게 설치되는 로터리식 오일펌프에 있어서 상기 내부로터(20)의 이(21)에 반지름 방향으로 작동홈(22)을 형성하고, 작동홈(22)과 교차하여 양측으로 통하도록 바이패스로(23)를 형성하며, 작동홈(22)에 플런저(24)를 스프링(25)으로 탄력지지 되게 설치하고 캡(26)으로 막아서 된 것이다.In the rotary oil pump in which the inner rotor 20 and the outer rotor 30 are eccentrically installed in the body 10, the groove 22 in the radial direction is radially formed on the teeth 21 of the inner rotor 20. ), The bypass passage 23 is formed so as to cross the operating groove 22 to both sides, and the plunger 24 is installed in the operating groove 22 to be elastically supported by the spring 25 and the cap ( 26).

상기 내부로터(20)의 이(21) 부위에 형성된 작동홈(22)과 바이패스로(23)는 그 단면이 원형상으로 되어 있다. 본 발명은 이 작동홈(22)에 플런저(24)를 삽입하고, 스프링(25)을 삽입한다. 그 다음에 캡(26)으로 나사체결하여 작동홈(22)을 막은 구조이다.The groove 22 and the bypass passage 23 formed in the teeth 21 of the inner rotor 20 have a circular cross section. In the present invention, the plunger 24 is inserted into the operation groove 22 and the spring 25 is inserted. The screw 26 is then screwed into the structure to block the operation groove (22).

그러므로 본 발명은 오일펌프가 작동하지 않을 때에는 스프링(25)의 탄성력에 의해 플런저(24)가 바이패스로(23)를 막게 된다.Therefore, in the present invention, when the oil pump is not operated, the plunger 24 blocks the bypass passage 23 by the elastic force of the spring 25.

본 발명은 오일펌프의 작동시 도시하지 않은 크랭크축의 회전에 따라 내부로터(20)가 회전함에 따라 내부로터(20)의 이(21) 외부로터(30)의 이(31) 사이에 차례로 끼어들어가게 되어 외부로터(30)도 내부로터(20)의 회전방향으로 회전하게 된다. 따라서 내·외부로터(20)(30) 사이에 생기는 공간용적이 변하게 되면서 오일이 입구에서 토출구로 밀려나가게 되는 것이다.According to the present invention, the inner rotor 20 rotates according to the rotation of the crankshaft (not shown) during operation of the oil pump so that the inner rotor 20 may be interposed between the teeth 21 of the outer rotor 30 and the teeth 31 of the outer rotor 30. The outer rotor 30 also rotates in the rotational direction of the inner rotor 20. Therefore, as the volume of space generated between the inner and outer rotors 20 and 30 is changed, the oil is pushed out from the inlet to the outlet.

한편, 엔진의 회전수가 증가함에 따라 내부로터(20)의 회전수가 증가하게 되는데, 내부로터(20) 회전수가 증가함에 따라 원심력에 의해서 플런저(24)가 외향으로 밀려나감과 동시에 스프링(25)이 압축된다. 그러므로, 고압축 공간의 오일중 일부가 바이패스로(23)로 통하여 저압측 공간으로 흘러나간다. 내부로터(20)의 회전수가 증가함에 따라 원심력도 증가하여 플런저(24)는 더욱 캡(26)측으로 밀려 플런저(24)가 막고있던 바이패스로(23)가 더 개방되어 통과하는 오일의 유량도 더욱 많아지게 된다.On the other hand, as the number of revolutions of the engine increases, the number of revolutions of the inner rotor 20 increases. As the number of revolutions of the inner rotor 20 increases, the plunger 24 is pushed outward by the centrifugal force and the spring 25 is compressed. do. Therefore, some of the oil in the high compression space flows out into the low pressure side space through the bypass passage 23. As the number of rotations of the inner rotor 20 increases, the centrifugal force also increases, so that the plunger 24 is pushed further toward the cap 26, so that the bypass passage 23, which the plunger 24 is blocking, is further opened to pass the oil flow rate. There will be more.

이와같이 내부로터(20)의 회전수에 비례한 압축오일의 양을 고압축 공간에서 저압축 공간으로 보내게 된다.In this way, the amount of compressed oil proportional to the rotational speed of the inner rotor 20 is sent from the high compression space to the low compression space.

상술한 바와같이 본 발명은 회전되는 내부로터의 원심력에 의해 작동되는 플런저에 의해 개폐되는 바이패스로를 내부로터에 형성하므로 별도의 바이패스 밸브를 펌프몸체에 설치할 필요가 없어 원가절감이 되며, 펌프내의 오일을 오일팬으로 회송시키지 않고 펌프내에서 순환시킴으로 에너지 손실이 없고, 펌프내부의 고압측 공간의 압력을 줄여서 맥동소음이 약해지는 효과가 있다. 또한 펌프내의 압력불균형을 줄여 펌프의 구동력이 저감되므로 엔진의 연비가 향상되는 잇점도 있다As described above, the present invention forms a bypass passage in the inner rotor which is opened and closed by the plunger operated by the centrifugal force of the rotating inner rotor, thereby eliminating the need to install a separate bypass valve on the pump body, thereby reducing the cost. By circulating the oil in the pump without returning it to the oil pan, there is no energy loss, and the pulsation noise is weakened by reducing the pressure in the high pressure side space inside the pump. In addition, there is an advantage that the fuel economy of the engine is improved because the pressure imbalance in the pump is reduced to reduce the driving force of the pump.

Claims (1)

몸체(10)에 내부로터(20)와, 외부로터(30)가 편심되게 설치되는 로터리식 오일펌프에 있어서, 상기 내부로터(20)의 이(21)에 반지름 방향으로 작동홈(22)을 형성하고, 작동홈(22)과 교차하여 양측으로 통하도록 바이패스로(23)를 형성하며, 작동홈(22)에 플런저(24)를 스프링(25)으로 탄력지지하여 설치하고 캡(26)으로 막아서 된 것을 특징으로 하는 바이패스로가 내부로터에 설치된 로터리식 오일펌프.In the rotary oil pump in which the inner rotor 20 and the outer rotor 30 are eccentrically installed on the body 10, the operation grooves 22 are radially formed on the teeth 21 of the inner rotor 20. Forming a bypass passage 23 so as to cross both sides of the working groove 22 and passing through both sides. The plunger 24 is elastically supported and installed in the working groove 22 by a spring 25 and a cap 26. Rotary oil pump is installed in the inner rotor bypass circuit, characterized in that blocked by.
KR1019940014794A 1994-06-27 1994-06-27 A rotary oil pump having by-pass circuit KR0125306B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940014794A KR0125306B1 (en) 1994-06-27 1994-06-27 A rotary oil pump having by-pass circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940014794A KR0125306B1 (en) 1994-06-27 1994-06-27 A rotary oil pump having by-pass circuit

Publications (2)

Publication Number Publication Date
KR960001412A KR960001412A (en) 1996-01-25
KR0125306B1 true KR0125306B1 (en) 1997-12-23

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KR1019940014794A KR0125306B1 (en) 1994-06-27 1994-06-27 A rotary oil pump having by-pass circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160061518A (en) 2014-11-21 2016-06-01 명화공업주식회사 Oil pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020019149A (en) * 2000-09-05 2002-03-12 이계안 Gear type oil pump
KR100412610B1 (en) * 2001-12-11 2003-12-31 현대자동차주식회사 Oil pump
KR101693883B1 (en) * 2011-04-26 2017-01-06 현대자동차주식회사 Variable Oil Pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160061518A (en) 2014-11-21 2016-06-01 명화공업주식회사 Oil pump

Also Published As

Publication number Publication date
KR960001412A (en) 1996-01-25

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